| Pycnocomeae | |
|---|---|
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Malpighiales |
| Family: | Euphorbiaceae |
| Subfamily: | Acalyphoideae |
| Tribe: | Pycnocomeae |
| Subtribes and genera | |
| |
Pycnocomeae is a tribe of plant of the family Euphorbiaceae. [1] It comprises 2 subtribes and 7 genera.
Phyllanthaceae is a family of flowering plants in the eudicot order Malpighiales. It is most closely related to the family Picrodendraceae.
The family Pandaceae consists of three genera that were formerly recognized in the Euphorbiaceae. Those are:
The Acalyphoideae are a subfamily within the family Euphorbiaceae with 116 genera in 20 tribes.
The Agrostistachydeae is a tribe of the subfamily Acalyphoideae, under the family Euphorbiaceae. It comprises 4 genera, which are monophyletic.
Chaetocarpeae is a tribe of plant of the family Euphorbiaceae. It comprises 2 genera.
The zosterophylls are a group of extinct land plants that first appeared in the Silurian period. The taxon was first established by Banks in 1968 as the subdivision Zosterophyllophytina; they have since also been treated as the division Zosterophyllophyta or Zosterophyta and the class or plesion Zosterophyllopsida or Zosteropsida. They were among the first vascular plants in the fossil record, and had a world-wide distribution. They were probably stem-group lycophytes, forming a sister group to the ancestors of the living lycophytes. By the late Silurian a diverse assemblage of species existed, examples of which have been found fossilised in what is now Bathurst Island in Arctic Canada.
Hicksbeachia is a genus of two species of trees in the family Proteaceae. They are native to rainforests of northern New South Wales and southeastern Queensland. They are commonly known as red bopple nut or beef nut due to the bright red colour of their fruits.
Droseridites is a genus of extinct plants of possible droseracean or nepenthacean affinity. It is a form taxon known only from fossil pollen. Species assigned to this genus originate from numerous regions of the world, including Europe, India, Egypt, the Arabian Peninsula, and the Kerguelen Islands.
Wattieza was a genus of prehistoric trees that existed in the mid-Devonian that belong to the cladoxylopsids, close relatives of the modern ferns and horsetails. The 2005 discovery in Schoharie County, New York, of fossils from the Middle Devonian about 385 million years ago united the crown of Wattieza to a root and trunk known since 1870. The fossilized grove of "Gilboa stumps" discovered at Gilboa, New York, were described as Eospermatopteris, though the complete plant remained unknown. These fossils have been described as the earliest known trees, standing 8 m (26 ft) or more tall, resembling the unrelated modern tree fern.
Ornatifilum is an artificial form genus, which is used to categorise any small, branched filaments with external ornamentation.
Rhynia is a single-species genus of Devonian vascular plants. Rhynia gwynne-vaughanii was the sporophyte generation of a vascular, axial, free-sporing diplohaplontic embryophytic land plant of the Early Devonian that had anatomical features more advanced than those of the bryophytes. Rhynia gwynne-vaughanii was a member of a sister group to all other eutracheophytes, including modern vascular plants.
Euphorbiaceae, the spurge family, is a large family of flowering plants. In English, they are also commonly called euphorbias, which is also the name of a genus in the family. Most spurges, such as Euphorbia paralias, are herbs, but some, especially in the tropics, are shrubs or trees, such as Hevea brasiliensis. Some, such as Euphorbia canariensis, are succulent and resemble cacti because of convergent evolution. This family has a cosmopolitan global distribution. The greatest diversity of species is in the tropics, however, the Euphorbiaceae also have many species in nontropical areas of all continents except Antarctica.
Michael O'Connell is Professor of Botany at the National University of Ireland, Galway.
Krithodeophyton is a genus of lower Devonian plant with branching axes. It is considered to be a barinophyte.
Ginkgo yimaensis is an extinct ginkgo species in the family Ginkgoaceae. It is a gymnosperm, first described by Zhou and Zhang.
Aphlebiae are the imperfect or irregular leaf endings commonly found on ferns and fossils of ferns from the Carboniferous Period, but seem to have disappeared by the beginning of the Mesozoic. According to the United States Geological Survey in 1983, “The discovery in recent years of Aplebiæ attached to the rachis of many species of Pecopteris and Sphenopteris, such as P. dentata, P. Biotii, P. abbrebiata, and Sphenopteris cremate strengthens the view now generally entertained, that most of the species of Aphlebia are stipal abortive pinnæ growing from the bases of primary or secondary rachises” (101). The word itself is derived from the Greek "phleb-", meaning vein, and "a-", meaning without.
Iguanurinae is a palm tree subtribe in the tribe Areceae. It is not recognized in recent classifications.
The Price Formation is a geologic formation in Virginia. It preserves fossils dating back to the Carboniferous period.
Retispora lepidophyta is a spore type and an important biostratigraphic marker of the latest Devonian period. The last appearance of Retispora lepidophyta defines the Devonian-Mississippian boundary in Belgium and other places.
The barinophytes are a group of extinct vascular plants (tracheophytes). Their relationship with other vascular plants is unclear. They have been treated as the separate class Barinophytopsida, the order Barinophytales of uncertain class and as a family or clade Barinophytaceae within the zosterophylls. They have also been considered to be possible lycopodiopsids.
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