Psilophyton - Wikipedia
WEBPsilophyton 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). Specimens have been found in northern Maine, USA; Gaspé Bay, Quebec and New Brunswick, Canada; the Czech Republic; and Yunnan, China.
Psilotales - an overview | ScienceDirect Topics
WEBThe Psilotales, or psilotophytes (commonly called “whisk ferns”), consist of the single family Psilotaceae, with two genera (Psilotum and Tmesipteris). Like all vascular plants, the whisk ferns have an independent, dominant, free-living sporophyte; the haploid gametophyte is small, obscure, and free-living in or on the soil.
SEEDLESS VASCULAR PLANTS
WEBThese three divisions along with the Pterophyta (ferns) are collectively know as the "seedless vascular plants". They have developed a vascular structure that permits the transport of water and nutrients but they do not reproduce by seeds.
Psilophyta: The Simplest Form of Vascular Plants - Plantlet
WEBThe 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 of leaves, they have small, scale-like appendages called “microphylls” that resemble tiny leaves.
Psilophytopsida - Wikipedia
WEBThe 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 Devonian periods which lack true roots and leaves, but have a vascular system within a branching cylindrical stem.
Psilotaceae - Wikipedia
WEBDescription. Once thought to be descendants of early vascular plants (the Psilophyta of the Devonian period), Psilotaceae have been shown by molecular phylogenetics to be ferns (Polypodiopsida), and a sister group of the Ophioglossaceae. The family contains two genera, Psilotum and Tmesipteris.
Psilophyta
WEBPhylum Psilophyta of the Plant Kingdom. Simple, plain in appearance, and without true leaves, the psilophytes are not plants of extreme beauty, although some are often cultivated, but they are unusual and often quite unique. They all have vascular systems, but lack seeds and roots.
Psilophyta - mindat.org
WEBThe 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 Devonian periods which lack true roots and leaves, but have a vascular system within a branching cylindrical stem.
The role of psilophyton in the evolution of vascular plants
WEBJan 1, 1980 — This paper lists the evolutionary advances that Psilophyton (Trimerophytina) shows over the simplest vascular plants like Cooksonia and Rhynia (Rhyniophytina). Both morphological and anatomical (using Psilophyton dawsonii, the only completely petrified example) advances are treated.
Classification of Psilophytopsida | Plants - Biology Discussion
WEBThe 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 Australia shows that these plants were of world-wide distribution in …