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20-525: Elaeocarpus sedentarius , commonly known as Minyon quandong , is a species of flowering plant in the family Elaeocarpaceae and is endemic to a restricted area of New South Wales . It is a medium-sized to large tree with elliptic to egg-shaped leaves, racemes of whitish flowers and more or less spherical blue fruit. Elaeocarpus sedentarius is a tree that typically grows to a height of up to 30 m (98 ft). The leaves are simple, (strictly compound with only one leaflet), elliptic to egg-shaped with

40-772: A pedicel 2–4 mm (0.079–0.157 in) long. The petals are 5–7 mm (0.20–0.28 in) long, the tip divided into about fifteen linear lobes and there are about twenty-five stamens . Flowering occurs in spring or summer and the is a fruit blue, more or less spherical drupe 20–35 mm (0.79–1.38 in) in diameter with a sculptured stone. Elaeocarpus sedentarius was first formally described in 2008 by David J. Maynard and Darren M. Crayn in Australian Systematic Botany from specimens collected by Maynard in Mount Jerusalem National Park . Minyon quandong grows in warm-temperate rainforest in

60-641: A pollen grain . The pollen is eventually released when the anther forms openings ( dehisces ). These may consist of longitudinal slits, pores, as in the heath family ( Ericaceae ), or by valves, as in the barberry family ( Berberidaceae ). In some plants, notably members of Orchidaceae and Asclepiadoideae , the pollen remains in masses called pollinia , which are adapted to attach to particular pollinating agents such as birds or insects. More commonly, mature pollen grains separate and are dispensed by wind or water, pollinating insects, birds or other pollination vectors. Pollen of angiosperms must be transported to

80-763: A few temperate -zone species. Most species are evergreen . They are found in Madagascar , Southeast Asia , Australia , New Zealand , West Indies , and South America . Plants in this family have simple leaves, usually arranged alternately, sometimes in opposite pairs or whorled often clustered at the ends of the branches, usually with a toothed edge but sometimes reduced to scales. The flowers are arranged in leaf axils , singly or in groups and are radially symmetrical. The flowers usually have both male and female organs, four or five sepals and four or five petals . In some genera there are twice as many stamens as petals and in others there may be many stamens. In most species

100-402: A great variety of patterns, some of them highly complex. It generally surrounds the gynoecium and is surrounded by the perianth . A few members of the family Triuridaceae , particularly Lacandonia schismatica and Lacandonia brasiliana , along with a few species of Trithuria (family Hydatellaceae ) are exceptional in that their gynoecia surround their androecia. Depending on

120-584: A small area on the south of the Mount Warning caldera in northern New South Wales. A single wild tree was also discovered in the north of the caldera, approximately 35 km north of the rest of the populations. This tree occurs in brush box ecotone areas and warm temperate rainforests. This quandong is listed as endangered under the Australian Government Environment Protection and Biodiversity Conservation Act 1999 and

140-591: A tiny fraction of a millimeter in Wolfia spp up to five inches (13 centimeters) in Canna iridiflora and Strelitzia nicolai . The stamens in a flower are collectively called the androecium . The androecium can consist of as few as one-half stamen (i.e. a single locule ) as in Canna species or as many as 3,482 stamens which have been counted in the saguaro ( Carnegiea gigantea ). The androecium in various species of plants forms

160-458: Is called appendiculate , e.g. Nerium odorum and some other species of Apocynaceae . In Nerium , the appendages are united as a staminal corona. A column formed from the fusion of multiple filaments is known as an androphore . Stamens can be connate (fused or joined in the same whorl) as follows: Anther shapes are variously described by terms such as linear , rounded , sagittate , sinuous , or reniform . The anther can be attached to

180-458: Is called a staminate flower , or (inaccurately) a male flower. A flower with a functional pistil but no functional stamens is called a pistillate flower , or (inaccurately) a female flower. An abortive or rudimentary stamen is called a staminodium or staminode , such as in Scrophularia nodosa . The carpels and stamens of orchids are fused into a column . The top part of the column

200-410: Is formed by the anther, which is covered by an anther cap . Stamens can also be adnate (fused or joined from more than one whorl): They can have different lengths from each other: or respective to the rest of the flower ( perianth ): They may be arranged in one of two different patterns: They may be arranged, with respect to the petals : Where the connective is very small, or imperceptible,

220-450: Is termed a locule ) and are attached to the filament either at the base or in the middle area of the anther. The sterile tissue between the lobes is called the connective , an extension of the filament containing conducting strands. It can be seen as an extension on the dorsal side of the anther. A pollen grain develops from a microspore in the microsporangium and contains the male gametophyte . The size of anthers differs greatly, from

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240-555: The anther is much longer than the filament of the stamen. The fruit is a capsule , a drupe or a berry . A phylogeny of the family, based on DNA sequences was published in 2006. Twelve genera of Elaeocarpaceae are accepted by Plants of the World Online as at August 2021: Stamen#Morphology and terminology A stamen typically consists of a stalk called the filament and an anther which contains microsporangia . Most commonly anthers are two-lobed (each lobe

260-443: The stigma , the receptive surface of the carpel , of a compatible flower, for successful pollination to occur. After arriving, the pollen grain (an immature microgametophyte) typically completes its development. It may grow a pollen tube and undergo mitosis to produce two sperm nuclei. In the typical flower (that is, in the majority of flowering plant species) each flower has both carpels and stamens . In some species, however,

280-614: The New South Wales Government Biodiversity Conservation Act 2016 . A Recovery Plan for the species (as Elaeocarpus sp. Rocky Creek) has been prepared. Elaeocarpaceae See text Elaeocarpaceae is a family of flowering plants . The family contains approximately 615 species of trees and shrubs in 12 genera . The largest genera are Elaeocarpus , with about 350 species, and Sloanea , with about 120. The species of Elaeocarpaceae are mostly tropical and subtropical , with

300-474: The anther (anther sacs or pollen sacs). The two separate locules on each side of an anther may fuse into a single locule. Each microsporangium is lined with a nutritive tissue layer called the tapetum and initially contains diploid pollen mother cells. These undergo meiosis to form haploid spores. The spores may remain attached to each other in a tetrad or separate after meiosis. Each microspore then divides mitotically to form an immature microgametophyte called

320-425: The anther lobes are close together, and the connective is referred to as discrete , e.g. Euphorbia pp., Adhatoda zeylanica . Where the connective separates the anther lobes, it is called divaricate , e.g. Tilia , Justicia gendarussa . The connective may also be a long and stalk-like, crosswise on the filament, this is a distractile connective, e.g. Salvia . The connective may also bear appendages, and

340-400: The flowers are unisexual with only carpels or stamens. ( monoecious = both types of flowers found on the same plant; dioecious = the two types of flower found only on different plants). A flower with only stamens is called androecious . A flower with only carpels is called gynoecious . A pistil consists of one or more carpels. A flower with functional stamens but no functional pistil

360-430: The narrower end towards the base, mostly 70–150 mm (2.8–5.9 in) long and 40–80 mm (1.6–3.1 in) wide on a petiole 30–60 mm (1.2–2.4 in) long, sometimes with wavy edges. The lower surface of the leaves is glaucous with scattered hairs and old leaves turn orange to dull red before falling. The flowers are borne in small groups along a raceme 20–50 mm (0.79–1.97 in) long, each flower on

380-432: The species of plant, some or all of the stamens in a flower may be attached to the petals or to the floral axis . They also may be free-standing or fused to one another in many different ways, including fusion of some but not all stamens. The filaments may be fused and the anthers free, or the filaments free and the anthers fused. Rather than there being two locules, one locule of a stamen may fail to develop, or alternatively

400-496: The two locules may merge late in development to give a single locule. Extreme cases of stamen fusion occur in some species of Cyclanthera in the family Cucurbitaceae and in section Cyclanthera of genus Phyllanthus (family Euphorbiaceae ) where the stamens form a ring around the gynoecium, with a single locule. Plants having a single stamen are referred to as "monandrous." A typical anther contains four microsporangia. The microsporangia form sacs or pockets ( locules ) in

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