Search results
Results from the WOW.Com Content Network
Equisetidae is one of the four subclasses of Polypodiopsida (ferns), a group of vascular plants with a fossil record going back to the Devonian. They are commonly known as horsetails. [ 2 ] They typically grow in wet areas, with whorls of needle-like branches radiating at regular intervals from a single vertical stem.
Angiopteris evecta is a self-supporting evergreen perennial fern with very large bipinnate fronds. The trunk-like rhizome is massive, measuring up to 1 m (3 ft 3 in) in diameter. The older portions of the rhizome lie on the ground while the newer growth may rise vertically up to 1.2 m (3 ft 11 in) high. The arching, glossy green fronds, which ...
Asparagus fern—This may apply to one of several species of the monocot genus Asparagus, which are flowering plants. Sweetfern—A flowering shrub of the genus Comptonia. Air fern—A group of animals called hydrozoans that are distantly related to jellyfish and corals. They are harvested, dried, dyed green, and then sold as a plant that can ...
The coelacanths were thought to have gone extinct 66 million years ago, until a living specimen belonging to the order was discovered in 1938. A living fossil is an extant taxon that phenotypically resembles related species known only from the fossil record. To be considered a living fossil, the fossil species must be old relative to the time ...
The tree ferns are arborescent (tree-like) ferns that grow with a trunk elevating the fronds above ground level, making them trees. Many extant tree ferns are members of the order Cyatheales, to which belong the families Cyatheaceae (scaly tree ferns), Dicksoniaceae, Metaxyaceae, and Cibotiaceae. It is estimated that Cyatheales originated in ...
The ferns and horsetails (the Polypodiophyta) form a clade; they use spores as their main method of dispersal. Traditionally, whisk ferns and horsetails were historically treated as distinct from 'true' ferns. [45] Living whisk ferns and horsetails do not have the large leaves (megaphylls) which would be expected of euphyllophytes.
There are 5 species of cycad listed as Extinct in the Wild: Encephalartos brevifoliolatus, Escarpment cycad. Encephalartos heenanii, Heenan's Cycad. Encephalartos nubimontanus, Blue cycad. Encephalartos relictus, Parlota cycad. Encephalartos woodii, Wood's cycad. Encephalartos woodii is known only from its type specimen, which was discovered in ...
Synonyms. Pteridospermatopsida. Pteridospermatophyta, also called " pteridosperms " or " seed ferns " are a polyphyletic [ 1 ] grouping of extinct seed-producing plants. The earliest fossil evidence for plants of this type are the lyginopterids of late Devonian age. [ 2 ] They flourished particularly during the Carboniferous and Permian periods.