184, see text
38-553: Maesa is a genus of flowering plants. It is placed in the family Primulaceae , subfamily Maesoideae, for which it is the sole genus ( monotypic ). Previously it was placed in Myrsinaceae , or in a family of its own, Maesaceae. There are 184 accepted species native to tropical and subtropical Africa, Asia, and the Pacific, the majority of which occur in Malesia , New Guinea , western Asia, and
76-704: A vicariant event between the Neotropics and the Palearctic in the case of the latter. The Primuloideae originating in the Palearctic, persisted till the last 16 mya, when it started to shift into the Nearctic . The three former families of the Primulales, together with the segregated Maesaceae, have been re-circumscribed into the broadly defined Primulaceae sensu lato ( s.l. ) The two uniting features of this family are
114-875: A basal rosette, and ovules rarely immersed in the placenta. In addition they often have syncolpate or sometimes polycolpate pollen , without margo. Subdivision has included the tribes Androsaceae and Primulae. Takhtajan (1997) gives the four genera of Androsaceae as Androsace (including Douglasia ), Vitaliana , Stimpsonia and Pomatosace , and the ten genera of Primulae as Omphalogramma , Bryocarpum , Primula , Dionysia , Cortusa , Kauffmannia , Hottonia , Srediskya , Dodecatheon and Soldanella . In contrast Kallersjo et al. (2000) place all genera in Primulae, and list thirteen in all: Androsace , Douglasia , Omphalogramma , Soldanella , Dodecatheon , Cortusa , Primula , Dionysia , Vitaliana , Hottonia , Bryocarpum , and Pomatosace . These two (or one) tribes represent
152-407: A few inches high) and their stems are stiffened by lignin . The stems can grow upright ( erect ) or spread out horizontally and then turn upright ( decumbent ). Leaves are simple , being directly attached to the stem by a petiole (stalk), but unlike the leaves of most flowering plants they have no stipules . The petiole is short or the leaf tapers gradually towards the base. Leaf arrangement
190-704: A free central placenta and one stamen opposite each of the corolla lobes. The cladogram below shows the infrafamilial phylogenetic relationships, together with the subfamilial crown ages. Maesoideae forms the basal group, while Primuloideae and Myrsinoideae are in a sister group relationship. Maesoideae Theophrastoideae Primuloideae Myrsinoideae Christenhusz et al. (2016, 2017) list 2,790 species and 53 genera , varying from 1 in Maesoideae to 38 in Myrsinoideae, with 8 in Theophrastoideae and
228-571: Is distinguished as Myrsinaceae s.l. in comparison to the previous smaller family, Myrsinaceae s.s. (less Maesa ). Some authors preferred to raise Samoleae to its own family, Samolaceae, but this has not been accepted by subsequent authors, placing it within Theophrastaceae, while recognising its distinct position within that grouping. These transfers, to preserve monophyly at the family level essentially left two tribes remaining in Primulaceae,
266-460: Is distributed in both tropical and subtropical regions of the Old World, ranging from East Africa to Japan. Once included in the Primulaceae tribe Samoleae, it has most commonly been considered as part of family Myrsinaceae, till segregated into its own family and then submerged as a Primulaceae s.l. subfamily. It has characteristics that distinguish it from Myrsinaceae and forms the basal group of
304-457: Is often tubular. The eight genera are confined to South and Central America. Samolus is a distinct genus, being sister to all other Theophrastoideae. Previously it formed its own tribe, Samoleae within Primulaceae s.s. , and in some systems, its own family, Samolaceae, but was subsequently transferred to Theophrastoideae. The Primulaceae are named for their nominative and type genus, Primula . Linnaeus used this name to reflect its place among
342-402: Is the calyx tube , and any non fused tips are the calyx lobes . Sympetalous : All the petals of a flower are fused into a cup, tube, or other shape. Stamens : Synandrous : Stamens are fused in an unspecified manner Synfilamentous : Stamens are fused by their filaments Synantherous : Stamens are fused by their anthers Syncarpous : Carpels are fused together to form
380-402: Is the case for anthers in several genera, such as Solanum ). [REDACTED] The stamens of Hibiscus (like many Malvaceae ) are synfilamentous. [REDACTED] Synanthery in a (dissected) flower of Sinningia cardinalis Terms for connation of flower parts [ edit ] Synsepalous : All the sepals of a flower are fused into a cup or tube; the fused portion
418-412: Is typically alternate but some are opposite or whorled, and there is generally a rosette at the base of the stem. The edges are toothed ( dentate ) or sawtoothed. New leaves in the bud are usually involute (rolled towards the upper surface) or conduplicate (folded upwards), but a few species roll downwards. Each flower is bisexual , having both stamens and carpels . They have radial symmetry ;
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#1732859506244456-665: The Asterids (Asteridae). Maesa was formally segregated in 2000. Further changes came from analysis of DNA sequence data. This led to the move of genera (primarily terrestrial non-basal-rosette) from Primulaceae to Mysinaceae and Theophrastaceae. At that time Primulaceae was considered to consist of nine tribes (Primuleae, Androsaceae, Ardisiandreae, Lysimachieae, Glauceae, Anagallideae, Corideae, Cyclamineae, and Samoleae). Notably, Lysimachieae and three smaller tribes, Corideae, Cyclamineae and Ardisiandreae, were transferred to Myrsinaceae, and Samoleae to Theophrastaceae. This enlarged Myrsinaceae
494-490: The Cronquist system (1988), Cronquist included the three closely related families, Primulaceae, Myrsinaceae and Theophrastaceae in the order Primulales , of subclass Dilleniidae , based on morphological characteristics, in particular, ovaries with free-central placentation, a feature considered synapomorphic . His circumscription of Primulaceae included about 800 species. These three families were referred to as
532-519: The cotyledons (two), form of the petals (fused), and position of the corolla with respect to the ovary (below). Jussieu's families were the Lysimachiae, including Primula and Theophrasta and the Sapotae , including Myrsine , these being the three main lineages in modern understanding. The most complete treatment of the Primulaceae family , with nearly 1,000 species arranged into 22 genera ,
570-436: The evening primrose family ), are a family of herbaceous and woody flowering plants including some favourite garden plants and wildflowers. Most are perennial though some species, such as scarlet pimpernel , are annuals . Previously one of three families in the order Primulales , it underwent considerable generic re-alignment once molecular phylogenetic methods were used for taxonomic classification . The order
608-561: The petals can be separate or partially or fully fused together to form a tube-shaped corolla that opens up at the mouth to form a bell-like shape (as in item 8 in the figure) or a flat-faced flower. In most of the families of Ericales, stamens alternate with lobes, but in Primulaceae there is a stamen opposite each petal. The calyx has 4 to 9 lobes and persists after flowering. They are grouped in unbranched, indeterminate clusters such as racemes, spikes, corymbs or umbels. The fruit of Primulaceae begins as an ovary and inside it are
646-509: The Hexandria Monogynia (six stamens one pistil ) in his sexual classification based on reproductive characteristics. Jussieu arranged Linnaeus' genera in a hierarchical system of ranks based on the relative value of a much wider range of characteristics. In his Genera plantarum (1789) he organised the primuloid genera into two Ordo ( families ), within a class (VIII) he called Dicotyledones Monopetalae Corolla Hypogyna , based on
684-466: The Pacific Islands. These plants are vines, shrubs, and trees up to 12 meters tall. 184 species are accepted. They include: This Primulaceae article is a stub . You can help Misplaced Pages by expanding it . Primulaceae The Primulaceae ( / ˌ p r ɪ m j ə ˈ l eɪ ʃ i . iː / PRIM -yə- LAY -shee-ee ), commonly known as the primrose family (but not related to
722-581: The Primulaceae subfamilies vary from 24 mya for the Maesoideae, the basal group , to 70 mya for the Theophrastoideae. The primuloids probably originated in a shared Neotropical / Indo-Malaysian ancestral range , with the Primulaceae/Ebenaceae clade occupying the neotropics. Theophrastoideae is nearly all neotropical with a more recent migration out of the realm found in the aquatic Samolus genus. The divergence between Theophrastoideae and Primuloideae-Myrsinoideae at 70 mya represents
760-634: The Primuleae and Androsaceae, with about 15 genera sharing a number of common characteristics. These additional changes were reflected in the 2003 revision of the APG system (APG II), where the now four primuloid families were among 23 in Ericales. This restricted Primulaceae sensu stricto ( s.s. ) consisted of three groups: The Primulae, including Primula , the largest genus; the Androsaceae, including Androsace ,
798-409: The clade as sister to all other subfamilies. The relatively large Myrsinoideae, has been treated as a number of tribes, e.g. Ardisieae and Myrsineae, and more recently Lysimachiaeae, a transfer from Primulaceae s.s. Ardisieae and Myrsineae represent the woody clades within the subfamily. Within the Myrsinoideae, the genera represented by the restricted Myrsinaceae s.s. , prior to the transfers from
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#1732859506244836-447: The embryo through free division of nuclei without forming walls ( nuclear endosperm formation ). The embryo forms a pair of short, narrow cotyledons (item 10 in the figure). Usually multiple seeds are in a capsule that is carried on a straight stalk ( pedicel or scape ). After it matures, it splits apart , releasing the seeds ballistically. The taxonomic history of Primulaceae has been long and complex. The botanical authority for
874-458: The family name is given to August Batsch (1794), as Batsch ex Borkh, using the term Primulae with six genera, the valid description being subsequently given by Borkhausen (1797). Some earlier authors attributed the name to Ventenat (1799), as Primulaceae Vent., who described the Primulacées, but Batsch had precedence. Linnaeus (1753) placed Primula and related primuloid genera in
912-475: The first flowers of spring, given the primrose's vernacular Latin name of primula veris ( lit. ' little first of spring ' ), primula (feminine diminutive primus , first + veris (genitive ver , spring). Distribution is cosmopolitan. The British National Collection of Double Primroses is held at Glebe Garden, at North Petherwin , in North Cornwall . Connation From Misplaced Pages,
950-571: The following cladogram , consists of seven major suprafamilial clades (e.g. balsaminoids, styracoids) and a group of "core" Ericales. Within the eracalean families, Primulaceae s.l. is shown as a sister group to Ebenaceae , and both are sister to Sapotaceae . These three families make up the primuloid clade. The fossil record of Primulaceae s.l. is sparse, but the crown group has been estimated as c. 46-61 million years old. The crown primuloids have been dated to c. 102 mya , with Primulaceae/Ebenaceae divergence at 80 mya. Crown ages for
988-412: The four primuloid families were reduced to the rank of subfamilies within Primulaceae s.l. Primulaceae s.l. sensu APG III form part of the speciose (species rich) Asterid order Ericales s.l. , with about 12,000 species and 22 families as per APG IV. Ericales is one of four major clades within the asterids, where it is sister to the euasterids . The phylogenetic structure of Ericales, as shown in
1026-532: The 💕 Term in botanical morphology Not to be confused with Cognation or Conation . Connation in plants is the developmental fusion of organs of the same type, for example, petals to one another to form a tubular corolla . This is in contrast to adnation , the fusion of dissimilar organs. Such organs are described as connate or adnate, respectively. When like organs that are usually well separated are placed next to each other, but not actually connected, they are described as connivent (that
1064-411: The future seeds ( ovules ). These are attached to a central axis without any partitions between them (an arrangement called free central placentation ; see item 7 in the figure), and they are bitegmic (having a double protective layer around each ovule). Unlike in most other families of Ericales, both layers form the opening at the top (the micropyle ). As seeds develop, an endosperm grows around
1102-451: The primuloid families. With the later development of molecular phylogenetic methods, the Primulales were found to be more closely related to other families within the Ericales , and the three primuloid families were subsequently absorbed into an expanded Ericales (Ericales sensu lato or s.l. ), making 24 families within that order, where the primuloids formed a monophyletic clade . It
1140-617: The remaining 6 in Primuloideae. Byng (2014) and Plants of the World Online list 55 accepted genera. The generic limits of Myrsinoideae are not fully resolved and the status of a number of genera is under revision. Maesoideae is a monogeneric subfamily, whose single genus is Maesa Forssk. It is a genus of trees. The flowers are small, with short tubules and semi-inferior ovary, arranged in axillary or terminal racemes , or in panicles . Maesa has about 100 species, and
1178-409: The remaining genera in Primuloideae (Primulaceae s.s. ) following redistribution among the Primulales on molecular grounds. The 600 species mainly belong to Androsace and Primula and belong to the mountainous regions of Europe and Asia (mainly China). Theophrastoideae consist of a relatively small subfamily, whose flowers are staminodial and bear berries . The ovary is superior, and the corolla
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1216-429: The second largest genus; together with a small third group containing Soldanella , Hottonia , Omphalogramma and Bryocarpum . The APG third classification system (APG III, 2009) discussed all the taxonomic challenges arising from the phylogenetic studies, and placed all primuloid genera into one large Primulaceae s.l. , corresponding to Cronquist's Primulales. They stated that "The biggest problem for APG III
1254-674: The then Primulaceae, form a distinct clade. Genera in Lysimachiaeae are Trientalis , Anagallis , Glaux , Lysimachia , Asterolinon and Pelletiera . Coris had its own tribe within Primulaceae s.s. , Corideae, but its molecular affinities led to its transfer to Myrsinoideae. Similarly, Ardisiandra was the tribe Ardisiandreae and Cyclamen the tribe Cyclamineae. The subfamily is characterised by scapose inflorescences , distinctly tubular flowers having campanulate or hypocrateriform corolla, imbricate corolla aestivation , isodiametric corolla epidermal cells, leaves almost always forming
1292-500: Was also apparent that Myrsinaceae were paraphyletic, unless the genus Maesa was segregated and elevated to become a new monogeneric family, Maesaceae , but also that Primulaceae were probably paraphyletic. In the first consensus taxonomic classification, the Angiosperm Phylogeny Group (APG 1998), these proposals were recognised by including Primulaceae within Ericales, as Eudicots , forming one of three clades in
1330-560: Was by Pax and Knuth in 1905 in the Engler system . They divided the family into five tribes (and several subtribes); Androsaceae, Cyclamineae, Lysimachieae, Samoleae and Corideae. Many systems since have lacked consistency, but generally recognised two major groups as either tribes or subfamilies, the Lysimachieae and Primuleae (the Androsaceae of Pax and Knuth), with the largest genera being Primula , Lysimachia and Androsace . In
1368-493: Was raised to the rank of a separate subfamily, making four in all. The family shares a number of characteristics, including haplostemonous flowers having the same number of petals and stamens, sympetalous corolla having the petals united, stamens opposite the petals , free central placentation , bitegmic (two layered) ovules and nuclear endosperm formation. Primulaceae are mostly herbaceous , having no woody stem, except that some form cushions (spreading mats
1406-454: Was the question of how to treat Primulaceae and their immediate relatives, a closely related group that in the past has often been recognized as a separate order". The decision to treat all genera as a single family was based on the observation that the new circumscriptions had little in the way of apomorphies , but the entire group had numerous synapomorphies and were easy to recognise. This resulted in an Ericales with 22 families. Consequently,
1444-404: Was then submerged in a much enlarged order Ericales and became a greatly enlarged Primulaceae sensu lato ( s.l ). In this new classification of the Angiosperm Phylogeny Group , each of the Primulales families was reduced to the rank of subfamily of Primulaceae s.l. The original Primulaceae (Primulaceae sensu stricto or s.s. ) then became subfamily Primuloideae, and one genus ( Maesa )
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