The lycophytes, when broadly circumscribed, are a vascular plant (tracheophyte) subgroup of the kingdom Plantae. They are sometimes placed in a division Lycopodiophyta or Lycophyta or in a subdivision Lycopodiophytina. They are one of the oldest lineages of extant (living) vascular plants; the group contains extinct plants that have been dated from the Silurian. Lycophytes were some of the dominating plant species of the Carboniferous period, and included tree-like species, although extant lycophytes are relatively small plants.
In plant anatomy and evolution a microphyll is a type of plant leaf with one single, unbranched leaf vein. Plants with microphyll leaves occur early in the fossil record, and few such plants exist today. In the classical concept of a microphyll, the leaf vein emerges from the protostele without leaving a leaf gap. Leaf gaps are small areas above the node of some leaves where there is no vascular tissue, as it has all been diverted to the leaf. Megaphylls, in contrast, have multiple veins within the leaf and leaf gaps above them in the stem.
Asteroxylon is an extinct genus of vascular plants of the Division Lycopodiophyta known from anatomically preserved specimens described from the famous Early Devonian Rhynie chert and Windyfield chert in Aberdeenshire, Scotland. Asteroxylon is considered the most basal member of the Lycopsida.
Eriospermum is a genus of tuberous flowering plants. It contains about 80-100 species, native to sub-Saharan Africa.
Cherry rasp leaf virus (CRLV) is a plant pathogenic virus of the order Picornavirales, family Secoviridae, genus Cheravirus.
Pea enation mosaic virus (PEMV) is a plant pathogenic virus.
Robertson Karoo is a semi-arid vegetation type, restricted to sections of the Breede River Valley, Western Cape Province, South Africa. It is a subtype of Succulent Karoo and is characterised by the dominance of succulent plant species, and by several endemic plants and animals.
Oryzavirus is a genus of double-stranded RNA viruses in the family Reoviridae and subfamily Spinareovirinae. Member viruses infect plants and are transmitted by planthoppers. Diseases associated with this genus include: rice stunting, enations on veins of leaves and leaf sheaths, ragged leaves, and flower suppression. There are currently only two species in this genus including the type species Rice ragged stunt virus.
Eriospermum paradoxum ("Haasklossie") is a species of geophytic plant of the genus Eriospermum, indigenous to southern Africa. Its habitat is sandy or rocky clay soils in arid winter-rainfall areas.
Eriospermum bowieanum is a species of geophytic plant of the genus Eriospermum, endemic to the Robertson Karoo region of the Western Cape Province, South Africa.
Eriospermum cooperi is a species of flowering plant of the Asparagaceae family. It is a summer rainfall species found in rocky grassland and open scrub from the Eastern Cape, South Africa to Zimbabwe. It has a solitary erect leaf, white to pale green flowers and grows to 60 cm. The outer tepals are sometimes reddish brown.
Eriospermum breviscapum is a species of geophytic plant of the genus Eriospermum, indigenous to South Africa.
Eriospermum capense is a species of geophytic plant of the genus Eriospermum, indigenous to the Western Cape Province, South Africa.
Eriospermum bayeri is a species of geophytic plant of the genus Eriospermum, indigenous to the Western Cape Province, South Africa.
Eriospermum proliferum is a species of flowering plant in the Asparagaceae family.
Eriospermum graminifolium is a species of geophytic plant of the genus Eriospermum, indigenous to South Africa.
Eriospermum zeyheri is a species of geophytic plant of the genus Eriospermum, indigenous to South Africa.
Eriospermum pubescens is a species of geophytic plant of the genus Eriospermum, indigenous to the southern Cape, South Africa.
Eriospermum lanceifolium is a species of geophytic plant of the genus Eriospermum.
Eriospermum exile is a species of geophytic plant of the genus Eriospermum, indigenous to South Africa.
