Overview

Psilophytales

Return to overview »

Results | All related links for this item | 1-8 of 8 results for:


Refine by type

Refine by product

 

Cooksonia hemispherica

Overview page. Subjects: Ecology and Conservation.

(family Rhyniaceae)

An extremely primitive plant from the Upper Silurian and Lower Devonian belonging to a family whose members did, however, possess an epidermis and stomata to...

See overview in Oxford Index

Lycopsida

Overview page. Subjects: Earth Sciences and Geography.

Class of the Pteridophytina, represented today by relatively small plants, the club mosses, although in the Carboniferous they included large trees which dominated the coal-swamp vegetation...

See overview in Oxford Index

pre-ferns

Overview page. Subjects: Earth Sciences and Geography.

A group of plants transitional between the Psilophytales and the true ferns, having some fern and some psilophyte characters. They had leaves and reproduced by spores, but had a variety of...

See overview in Oxford Index

Psilotaceae

Overview page. Subjects: Plant Sciences and Forestry.

(order Psilotales)

A family of very ancient and primitive vascular cryptogams (Pteridophyta), characterized by forked stems bearing small, scale-like appendages (Psilotum), or...

See overview in Oxford Index

Pteridophytina

Overview page. Subjects: Earth Sciences and Geography.

Subdivision of the plant kingdom, comprising the classes Lycopsida (club mosses), Sphenopsida (horsetails), Psilopsida (but see psilophytales), and Pteropsida (the various families of...

See overview in Oxford Index

Rhynia

Overview page. Subjects: Earth Sciences and Geography.

An early vascular plant, first known from the Lower Devonian Rhynie Chert, Aberdeenshire, Scotland, and described by R. Kidston and W. H. Lang in a series of papers between 1917 and 1921. R...

See overview in Oxford Index

Tmesipteris

Overview page. Subjects: Plant Sciences and Forestry.

(family Psilotaceae)

A genus of primitive cryptogamic vascular plants which (unlike Psilotum, the other genus of the family) have strap-shaped, pointed, one-veined leaves, and...

See overview in Oxford Index

Zosterophyllum

Overview page. Subjects: Earth Sciences and Geography.

A Lower Devonian psilopsid plant (Psilophytales) whose lower parts underwent H-branching, producing a tufted growth habit. Erect branches were smooth and the sporangia (see spore) were...

See overview in Oxford Index