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64-561: Prior to the arrival of European settlers in the 18th century, the Anacostia River was a fast-flowing and relatively silt-free river with very few mudflats or marshes. White settlers cleared much of the surrounding forest for farmland, however, and extensive soil erosion led to a heavy load of silt and effluent in the Anacostia. In 1805, local landowner Benjamin Stoddert built a wooden bridge over

128-499: A sod -forming perennial grass used in agriculture is Thinopyrum intermedium . Grasses are used as raw material for a multitude of purposes, including construction and in the composition of building materials such as cob , for insulation, in the manufacture of paper and board such as oriented structural straw board . Grass fiber can be used for making paper , biofuel production, nonwoven fabrics, and as replacement for glass fibers used in reinforced plastics. Bamboo scaffolding

192-477: A 30 feet (9.1 m) wide culvert.) The dredging ship Benning also dredged about half of Kingman Lake to deepen it. By this time, the conduit and gates had been installed in the lake's lower exit, and the upper gates were expected to be installed soon. About 200 acres (81 ha) of the western shore of Kingman Lake between Gallinger Hospital and Benning Bridge were set aside for gardens in March 1933 to provide food for

256-560: A 9 feet (2.7 m) wide channel from Massachusetts Avenue SE to the Maryland -District border line. In addition to this channel (which was meant to facilitate the passage of cargo ships) the McMillan Commission proposed building a dam across the Anacostia River at Massachusetts Avenue SE or at Benning Bridge to form a large lake for fishing and recreational boating. The commission also proposed using dredged material to build islands within

320-415: A one-star billet is two to four years. Other than voluntary retirement, statute sets a number of mandates for retirement. All brigadier generals must retire after five years in grade or 30 years of service, whichever is later, unless selected or appointed for promotion, or reappointed to grade to serve longer. Otherwise, all general and flag officers must retire the month after their 64th birthday. However,

384-577: A photosynthetic pathway, linked to specialized Kranz leaf anatomy , which allows for increased water use efficiency , rendering them better adapted to hot, arid environments. The C3 grasses are referred to as "cool-season" grasses, while the C4 plants are considered "warm-season" grasses. Although the C4 species are all in the PACMAD clade (see diagram below), it seems that various forms of C4 have arisen some twenty or more times, in various subfamilies or genera. In

448-471: A playground be built on the shores of Kingman Island. A number of development proposals were made for Kingman Lake throughout the 1960s. The National Capital Parks Commission banned boating on the lake in October 1961. The commission also proposed filling in 59 acres (24 ha) of Kingman Lake (about 50 to 60 percent of the lake's total area) and relocating some of the riprap walls, making Islands 3 and 4 part of

512-515: A second lake (East Lake) on the eastern side of the Anacostia River opposite Kingman Lake. That same year, the National Aeronautic Association proposed filling in all or part of Kingman Lake to build a new city airport. In early 1929, a channel 6 feet (1.8 m) deep was dredged under Benning Bridge as it passed over Kingman Lake. (As of 1998, due to the reconstruction of Benning Bridge and other changes, this had been replaced with

576-596: A smaller part of the vegetation in almost every other terrestrial habitat. Grass-dominated biomes are called grasslands. If only large, contiguous areas of grasslands are counted, these biomes cover 31% of the planet's land. Grasslands include pampas , steppes , and prairies . Grasses provide food to many grazing mammals, as well as to many species of butterflies and moths . Many types of animals eat grass as their main source of food, and are called graminivores – these include cattle , sheep , horses , rabbits and many invertebrates , such as grasshoppers and

640-904: A variety that include grasses that are related to modern rice and bamboo . Grasses have adapted to conditions in lush rain forests , dry deserts , cold mountains and even intertidal habitats , and are currently the most widespread plant type; grass is a valuable source of food and energy for all sorts of wildlife. A cladogram shows subfamilies and approximate species numbers in brackets: Chloridoideae (1600) Danthonioideae (300) Micrairoideae (200) Arundinoideae (50) Panicoideae (3250) Aristidoideae (350) Oryzoideae (110) Bambusoideae – bamboos (1450) Pooideae (3850) Puelioideae (11) Pharoideae (13) Anomochlooideae (4) Before 2005, fossil findings indicated that grasses evolved around 55 million years ago. Finds of grass-like phytoliths in Cretaceous dinosaur coprolites from

704-473: Is a grass used as a culinary herb for its citrus-like flavor and scent. Many species of grass are grown as pasture for foraging or as fodder for prescribed livestock feeds, particularly in the case of cattle , horses , and sheep . Such grasses may be cut and stored for later feeding, especially for the winter, in the form of bales of hay or straw , or in silos as silage . Straw (and sometimes hay) may also be used as bedding for animals. An example of

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768-465: Is a large and nearly ubiquitous family of monocotyledonous flowering plants commonly known as grasses . It includes the cereal grasses, bamboos , the grasses of natural grassland and species cultivated in lawns and pasture . The latter are commonly referred to collectively as grass . With around 780 genera and around 12,000 species, the Poaceae is the fifth-largest plant family , following

832-670: Is abbreviated as BG in the Army, BGen in the Marine Corps, and Brig Gen in the Air Force and Space Force. The Civil Air Patrol also uses this grade for its National Vice Commander and some past National commanders. The rank of brigadier general has existed in the U.S. military since the inception of the Continental Army in June 1775. To prevent mistakes in recognizing officers, a general order

896-566: Is able to withstand typhoon-force winds that would break steel scaffolding. Larger bamboos and Arundo donax have stout culms that can be used in a manner similar to timber, Arundo is used to make reeds for woodwind instruments , and bamboo is used for innumerable implements. Phragmites australis (common reed) is important for thatching and wall construction of homes in Africa. Grasses are used in water treatment systems, in wetland conservation and land reclamation , and used to lessen

960-937: Is for piecing together historical landscapes and weather patterns, considering other factors such as genetic material amount might also affect pollen size. Despite these challenges, new techniques in Fourier-Transform Infrared Spectroscopy (FT-IR) and improved statistical methods are now helping to better identify these similar-looking pollen types. Grasses are the primary plants used in lawns, which themselves derive from grazed grasslands in Europe. They also provide an important means of erosion control (e.g., along roadsides), especially on sloping land. Grass lawns are an important covering of playing surfaces in many sports, including football (soccer) , American football , tennis , golf , cricket , softball and baseball . Brigadier general (United States) In

1024-606: Is linked to crop improvement, since meiotic recombination is an important component of plant breeding . Unlike in animals, the specification of both male and female plant germlines occurs late in development during flowering. The transition from the sporophyte phase to the gametophyte state is initiated by meiotic entry. Grasses are, in human terms, perhaps the most economically important plant family. Their economic importance stems from several areas, including food production, industry, and lawns . They have been grown as food for domesticated animals for up to 6,000 years and

1088-463: Is one silver star worn on the shoulder or collar, and has not changed since the creation of the rank two centuries ago. Since the Mexican–American War , however, the lower rank of colonel has been the normal rank appointed to command a brigade that is organic to a division ( e.g. , the 1st Brigade of the 94th Infantry Division , vice the 187th Infantry Brigade ). While separate brigades (e.g.

1152-449: The Aristida genus for example, one species ( A. longifolia ) is C3 but the approximately 300 other species are C4. As another example, the whole tribe of Andropogoneae , which includes maize , sorghum , sugar cane , " Job's tears ", and bluestem grasses , is C4. Around 46 percent of grass species are C4 plants. The name Poaceae was given by John Hendley Barnhart in 1895, based on

1216-698: The Albian stage of the Early Cretaceous approximately 113–100 million years ago, which were found to belong to primitive lineages within Poaceae, similar in position to the Anomochlooideae. These are currently the oldest known grass fossils. The relationships among the three subfamilies Bambusoideae, Oryzoideae and Pooideae in the BOP clade have been resolved: Bambusoideae and Pooideae are more closely related to each other than to Oryzoideae. This separation occurred within

1280-503: The Americas ). Sugarcane is the major source of sugar production. Additional food uses of sugarcane include sprouted grain , shoots , and rhizomes , and in drink they include sugarcane juice and plant milk , as well as rum , beer , whisky , and vodka . Bamboo shoots are used in numerous Asian dishes and broths, and are available in supermarkets in various sliced forms, in both fresh, fermented and canned versions. Lemongrass

1344-550: The Asteraceae , Orchidaceae , Fabaceae and Rubiaceae . The Poaceae are the most economically important plant family, providing staple foods from domesticated cereal crops such as maize , wheat , rice , oats , barley , and millet for people and as feed for meat-producing animals . They provide, through direct human consumption, just over one-half (51%) of all dietary energy; rice provides 20%, wheat supplies 20%, maize (corn) 5.5%, and other grains 6%. Some members of

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1408-453: The Cenozoic contributed to the spread of grasses. Without large grazers, fire-cleared areas are quickly colonized by grasses, and with enough rain, tree seedlings. Trees eventually outcompete most grasses. Trampling grazers kill seedling trees but not grasses. Sexual reproduction and meiosis have been studied in rice , maize , wheat and barley . Meiosis research in these crop species

1472-554: The United States Armed Forces , a brigadier general is a one-star general officer in the United States Army , Marine Corps , Air Force , and Space Force . A brigadier general ranks above a colonel and below a major general . The pay grade of brigadier general is O-7. It is equivalent to the rank of rear admiral (lower half) in the other United States uniformed services which use naval ranks . It

1536-422: The ligule lies at the junction between sheath and blade, preventing water or insects from penetrating into the sheath. Flowers of Poaceae are characteristically arranged in spikelets , each having one or more florets. The spikelets are further grouped into panicles or spikes . The part of the spikelet that bears the florets is called the rachilla. A spikelet consists of two (or sometimes fewer) bracts at

1600-491: The 187th, commanded by then-BG William Westmoreland in Korea) were traditionally commanded by brigadier generals, this practice has ceased in recent history. Today, an Army or Marine Corps "BG" or "BGen," respectively, typically serves as deputy commander to the commanding general of a division or division-sized units and assists in overseeing the planning and coordination of a mission. A Marine Expeditionary Brigade (MEB), as

1664-659: The Anacostia River and Kingman Lake. In 1934, the Corps of Engineers transferred ownership of the Anacostia Flats and Kingman Lake to the National Park Service. As the Corps continued to dredge fill, it expanded the flats on the eastern side of Kingman Lake, making it smaller than originally intended. Work on the lake stopped in 1941 due to budgetary and resource shortages associated with the advent of World War II . Health issues regarding Kingman Lake again became prominent in

1728-443: The Anacostia River at the present site of Benning Bridge. The bridge was sold to Thomas Ewell, who in the 1820s sold it to William Benning. Thereafter the structure was known as Benning's Bridge (or Benning Bridge). The wooden bridge was rebuilt several times after 1805. This included construction of a steel bridge in 1892. The construction of Benning and other bridges and the diversion of inflowing streams to agricultural use also slowed

1792-445: The Anacostia River by linking several of the mid-river islands it had built with dikes. That same year, Congress specifically prohibited the Corps from extending Anacostia Park beyond Benning Bridge, which forced the Corps to drop its plans for a drawbridge. By March 1926, the Corps had begun calling the lake it had created Kingman Lake, after the well-regarded former head of the Corps, Brigadier General Dan Christie Kingman . The name

1856-562: The Poaceae are used as building materials ( bamboo , thatch , and straw ); others can provide a source of biofuel , primarily via the conversion of maize to ethanol . Grasses have stems that are hollow except at the nodes and narrow alternate leaves borne in two ranks. The lower part of each leaf encloses the stem, forming a leaf-sheath. The leaf grows from the base of the blade, an adaptation allowing it to cope with frequent grazing. Grasslands such as savannah and prairie where grasses are dominant are estimated to constitute 40.5% of

1920-489: The President nominates an officer for appointment to fill that position. For all five uniformed services, because the grade of brigadier general is a permanent rank, the nominee may still be screened by an in-service promotion board. The rank does not expire when the officer vacates a one-star position. Tour length varies depending on the position, by statute, or when the officer receives a new assignment. The average tour length of

1984-478: The Secretary of Defense can defer a general or flag officer's retirement until the officer's 66th birthday and the President can defer it until the officer's 68th birthday. Because there are a finite number of General officer positions, one officer must retire before another can be promoted. As a result, General and flag officers typically retire well in advance of the statutory age and service limits, so as not to impede

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2048-544: The advice of the Secretary of Defense, the service secretary, and if applicable, the service's chief of staff or commandant. The President may nominate any eligible officer who is not on the recommended list if it serves in the interest of the nation, but this is uncommon. The Senate must then confirm the nominee before the officer can be promoted. Once the nominee is confirmed, they are promoted to that rank once they assume or hold an office that requires or allows an officer of that rank. For positions of office reserved by statute,

2112-442: The base, called glumes , followed by one or more florets. A floret consists of the flower surrounded by two bracts, one external—the lemma —and one internal—the palea . The flowers are usually hermaphroditic — maize being an important exception—and mainly anemophilous or wind-pollinated, although insects occasionally play a role. The perianth is reduced to two scales, called lodicules , that expand and contract to spread

2176-515: The cargo traffic through the lake. The firm of Sanford and Brooks began the dredging in January 1903, at which time the Army Corps of Engineers began surveying the surrounding land to determine whether the federal government or private landowners had title to the marshes themselves. By 1920, the Corps of Engineers had dropped the dam idea and proposed creating a 6 feet (1.8 m) deep lake on one side of

2240-450: The caterpillars of many brown butterflies . Grasses are also eaten by omnivorous or even occasionally by primarily carnivorous animals. Grasses dominate certain biomes , especially temperate grasslands , because many species are adapted to grazing and fire. Grasses are unusual in that the meristem is near the bottom of the plant; hence, grasses can quickly recover from cropping at the top. The evolution of large grazing animals in

2304-830: The erosional impact of urban storm water runoff. Pollen morphology, particularly in the Poaceae family, is key to figuring out their evolutionary relationships and how environments have changed over time . Grass pollen grains, however, often look the same, making it hard to use them for detailed climate or environmental reconstructions. Grass pollen has a single pore and can vary a lot in size, from about 20 to over 100 micrometers, and this size difference has been looked into for clues about past habitats, to tell apart domesticated grasses from wild ones, and to indicate various biological features like how they perform photosynthesis , their breeding systems, and genetic complexity. Yet, there's ongoing debate about how effective pollen size

2368-441: The flats were unsanitary. Health officials also feared that the flats were a prime breeding ground for malaria - and yellow fever -carrying mosquitoes . By 1876, a large mudflat had formed just to the south of the western end of Benning Bridge, and another mudflat about 740 feet (230 m) wide had developed in the river south of that. By 1883, a stream named "Succabel's Gut" traversed the upper flat and another dubbed "Turtle Gut"

2432-469: The full list of Poaceae genera . The grass family is one of the most widely distributed and abundant groups of plants on Earth . Grasses are found on every continent, including Antarctica . The Antarctic hair grass, Deschampsia antarctica is one of only two plant species native to the western Antarctic Peninsula . Grasses are the dominant vegetation in many habitats, including grassland , salt-marsh , reedswamp and steppes . They also occur as

2496-478: The grains of grasses such as wheat , rice, maize (corn) and barley have been the most important human food crops . Grasses are also used in the manufacture of thatch , paper , fuel , clothing , insulation , timber for fencing , furniture , scaffolding and construction materials, floor matting , sports turf and baskets . Of all crops grown, 70% are grasses. Agricultural grasses grown for their edible seeds are called cereals or grains (although

2560-400: The lake back into a tidal marsh . The Corps said it would remove some of the riprap wall and create 42 acres (17 ha) of marsh north of Benning Bridge and 7 acres (2.8 ha) of marsh between Benning Bridge and East Capitol Street Bridge. Work on the tidal marsh would be complete by March 2000, and during the summer of 2000 the Corps intended to plant tens of thousands of aquatic plants in

2624-556: The lake in front of two friends after diving from a fishing boat. Over the next four decades, at least 31 people drowned in the lake. Some of the more unusual accidents and deaths involving the lake include: List of lakes in the Washington, D.C. area Poaceae Gramineae  Juss. Poaceae ( / p oʊ ˈ eɪ s i . iː , - s i aɪ / poh- AY -see-e(y)e ), also called Gramineae ( / ɡ r ə ˈ m ɪ n i . iː , - n i aɪ / grə- MIN -ee-e(y)e ),

Kingman Lake - Misplaced Pages Continue

2688-469: The lake. The Washington Post reported in July 1914 that Congress had approved the plan for a dam on the river at Massachusetts Avenue SE. By 1916, the Corps of Engineers was still planning a dam, with access to the 9 feet (2.7 m) deep lake behind it controlled by locks . The Corps also planned to create several large islands in the lake and planned to replace Benning Bridge with a drawbridge to accommodate

2752-459: The land area of the Earth , excluding Greenland and Antarctica . Grasses are also an important part of the vegetation in many other habitats, including wetlands , forests and tundra . Though they are commonly called "grasses", groups such as the seagrasses , rushes and sedges fall outside this family. The rushes and sedges are related to the Poaceae, being members of the order Poales , but

2816-453: The latest Cretaceous ( Maastrichtian ) aged Lameta Formation of India have pushed this date back to 66 million years ago. In 2011, fossils from the same deposit were found to belong to the modern rice tribe Oryzeae , suggesting substantial diversification of major lineages by this time. In 2018, a study described grass microfossils extracted from the teeth of the hadrosauroid dinosaur Equijubus normani from northern China, dating to

2880-615: The latter term, when used agriculturally, refers to both cereals and similar seeds of other plant species, such as buckwheat and legumes ). Three cereals—rice, wheat, and maize (corn)—provide more than half of all calories consumed by humans. Cereals constitute the major source of carbohydrates for humans and perhaps the major source of protein; these include rice (in southern and eastern Asia ), maize (in Central and South America ), and wheat and barley (in Europe , northern Asia and

2944-463: The leaves are attached. Grass leaves are nearly always alternate and distichous (in one plane), and have parallel veins. Each leaf is differentiated into a lower sheath hugging the stem and a blade with entire (i.e., smooth) margins. The leaf blades of many grasses are hardened with silica phytoliths , which discourage grazing animals; some, such as sword grass , are sharp enough to cut human skin. A membranous appendage or fringe of hairs called

3008-469: The lemma and palea; these are generally interpreted to be modified sepals. The fruit of grasses is a caryopsis , in which the seed coat is fused to the fruit wall. A tiller is a leafy shoot other than the first shoot produced from the seed. Grass blades grow at the base of the blade and not from elongated stem tips. This low growth point evolved in response to grazing animals and allows grasses to be grazed or mown regularly without severe damage to

3072-651: The lower, and both flats hosted substantial populations of American lotus , lily pads , and wild rice . In 1898, officials with the United States Army Corps of Engineers and the District of Columbia convinced the United States Congress that the Anacostia River should be dredged to create a more commercially viable channel that would enhance the local economy as well as provide land where factories or warehouses might be built. The material dredged from

3136-443: The mainland and adding 19 acres (7.7 ha) to Langston Golf Course (located on the northern half of Kingman Island). This plan was never acted on. Since 1999, a variety of proposals have been made for Kingman Lake, most focusing on retaining the lake's character as one of the few remaining wild places within the city's limits. In September 1999, the Army Corps of Engineers—which retained ownership of Kingman Lake—began transforming

3200-412: The medium capability (and sized) scalable Marine Air Ground Task Force (MAGTF) with up to 20,000 Marines, is normally commanded by a Marine BGen. An Air Force brigadier general typically commands a large wing or serves as the deputy commander for a NAF . Additionally, one-star officers of all services may serve as high-level staff officers in large military organizations. U.S. law explicitly limits

3264-436: The mid-1950s. An American University biologist found that the bed of Kingman Lake was composed almost entirely of fecal matter , and warned that no one should swim in the lake due to the extensive pollution. The immense amount of raw sewage in the lake was attributed to low water flows, and the lack of southern locks to allow water to more freely pass out of the lake. Nonetheless, a year later city officials were advocating that

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3328-420: The needy. The drainage of raw sewage into Kingman Lake and the Anacostia River first became an issue in the early 1930s. An open sewer channel drained into Kingman Lake through the middle of this tract, but a footbridge was constructed over it to link the two areas. Later that year, the Army Corps of Engineers spent $ 853,000 to extend Washington's sewer system to Bladensburg to collect raw sewage being dumped into

3392-482: The new marshlands. The cost of the wall removal, marsh restoration, and plantings was estimated at $ 4 million. A five-year scientific effort would monitor changes in the tidal marsh from 2001 to 2006. Deaths and accidents in and around Kingman Lake have unfortunately been numerous. The first confirmed death in Kingman Lake occurred on August 5, 1937, when William O'Bryant, a 19-year-old African American youth, drowned in

3456-659: The permanent grade of brigadier general, eligible officers are screened by a promotion board consisting of general officers from their branch of service. This promotion board then generates a list of officers it recommends for promotion to general rank. This list is then sent to the service secretary and the Joint Chiefs for review before it can be sent to the President , through the Secretary of Defense , for consideration. The President nominates officers to be promoted from this list with

3520-400: The plant. Three general classifications of growth habit present in grasses: bunch-type (also called caespitose), stoloniferous , and rhizomatous . The success of the grasses lies in part in their morphology and growth processes and in part in their physiological diversity. There are both C3 and C4 grasses, referring to the photosynthetic pathway for carbon fixation. The C4 grasses have

3584-622: The relatively short time span of about 4 million years. According to Lester Charles King , the spread of grasses in the Late Cenozoic would have changed patterns of hillslope evolution favouring slopes that are convex upslope and concave downslope and lacking a free face were common. King argued that this was the result of more slowly acting surface wash caused by carpets of grass which in turn would have resulted in relatively more soil creep . There are about 12,000 grass species in about 771 genera that are classified into 12 subfamilies. See

3648-413: The responsibilities of the rank expanded significantly. During the period from March 16, 1802, to January 11, 1812, the rank of major general was abolished and brigadier general became the highest rank in the U.S. Army. Foreseeing the need for an expanded general staff in case of war, which seemed imminent, Congress restored the rank of major general in January 1812. The insignia for a brigadier general

3712-440: The river would be used to build up the flats and turn them into dry land, eliminating the public health dangers they caused. Most of the reclaimed mudflats were subsequently declared to be parkland and named Anacostia Water Park (now Anacostia Park ) in 1919. The original dredging plan called for a channel 15 feet (4.6 m) wide on the Anacostia's west bank from the 11th Street Bridges to Massachusetts Avenue SE , narrowing to

3776-425: The river's current, allowing much of the silt to settle and be deposited. Between 1860 and the late 1880s, large mudflats ("the Anacostia flats") formed on both banks of the Anacostia River due to this deforestation and runoff. At this time, the city allowed its sewage to pour untreated into the Anacostia. Marsh grass began growing in the flats, trapping the sewage and leading public health experts to conclude that

3840-412: The seagrasses are members of the order Alismatales . However, all of them belong to the monocot group of plants. Grasses may be annual or perennial herbs , generally with the following characteristics (the image gallery can be used for reference): The stems of grasses, called culms , are usually cylindrical (more rarely flattened, but not 3-angled) and are hollow, plugged at the nodes , where

3904-481: The total number of general officers who may be on active duty. The total number of active duty general officers is capped at 218 for the Army, 62 for the Marine Corps, 170 for the Air Force, and 21 for the Space Force. The President or Secretary of Defense may increase the number of slots for one branch, so long as they subtract an equal number from another. Some of these slots are reserved by statute. For promotion to

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3968-459: The tribe Poeae described in 1814 by Robert Brown , and the type genus Poa described in 1753 by Carl Linnaeus . The term is derived from the Ancient Greek πόα (póa, "fodder") . Grasses include some of the most versatile plant life-forms . They became widespread toward the end of the Cretaceous period, and fossilized dinosaur dung ( coprolites ) have been found containing phytoliths of

4032-475: Was formally proposed in September. Improvements to the island and lake continued: The Corps spent $ 55,000 for a rock and concrete riprap wall around Kingman Lake, and another $ 20,000 for gates and conduits at the north and south ends of the lake to maintain a constant water level in lake. The Corps wanted to install a lock in the southern end of the lake to give pleasure boats access to it, and began laying plans for

4096-423: Was issued on July 14, 1775, establishing that brigadier generals would wear a ribbon, worn across the breast, between coat and waistcoat, pink in color. Later, on June 18, 1780, it was prescribed that brigadier generals would instead wear a single silver star on each epaulette . At first, brigadier generals were infantry officers who commanded a brigade ; however, over the course of the 19th and 20th centuries,

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