Psilophyton is a genus of extinct vascular plants. Described in 1859, it was one of the first fossil plants to be found which was of Devonian age (about 420 to 360 million years ago). …

Psilophytopsida is a now obsolete class containing one order, Psilophytales, which was previously used to classify a number of extinct plants which are now placed elsewhere.

The Psilophyta are a group of primitive vascular plants that belong to the division Psilotophyta. They are known for their simple, unbranched stems and lack of true leaves and roots. Instead …

Psilotophyta (sīlō´tŏf´ətə), division of vascular plants consisting of only two genera, Psilotum and Tmesipteris, with very few species. These plants are characterized by the lack of roots, and, in …

The Psilophytopsida comprise of the fossilised ancient Silurian-Devonian order Psilophytales. The discovery of the different genera from such wide places as Canada, Scotland, Europe and …

Psilotaceae is a family of ferns (class Polypodiopsida) consisting of two genera, Psilotum and Tmesipteris with about a dozen species. [1] . It is the only family in the order Psilotales. [2]

The class was established in 1917, under the name Psilophyta, with only three genera (Rhynia, Horneophyton and Psilophyton) for a group of fossil plants from the Upper Silurian and …

Psilophyta A phylum of primitive tracheophyte plants that contains two extant genera – Psilotum (whisk ferns) and Tmesipteris – as well as numerous extinct forms that flourished in the …

Dec 4, 2024 · Psilopsida are characterized by simple, dichotomously branching stems and small, scale-like leaves without true vascular tissue. They reproduce via spores and are distributed in …

Jan 1, 1980 · This paper lists the evolutionary advances that Psilophyton (Trimerophytina) shows over the simplest vascular plants like Cooksonia and Rhynia (Rhyniophytina). Both …