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Psilophytales

Overview page. Subjects: Earth Sciences and Geography — Plant Sciences and Forestry.

Primitive pteridophytes, which were the earliest vascular plants, from the Silurian and Devonian. They had slender, tapering, leafless, or scale-bearing stems up to 50 cm high, often with...

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Psilophytales

Overview page. Subjects: Earth Sciences and Geography — Plant Sciences and Forestry.

Primitive pteridophytes, which were the earliest vascular plants, from the Silurian and Devonian. They had slender, tapering, leafless, or scale-bearing stems up to 50 cm high, often with...

See overview in Oxford Index

Psilophytales

Edited by MICHAEL ALLABY.

in A Dictionary of Earth Sciences

January 2008; p ublished online January 2008 .

Reference Entry. Subjects: Earth Sciences and Geography. 109 words.

Primitive pteridophytes, which were the earliest vascular plants, from the Silurian and the Devonian. They had slender, tapering,

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Psilophytales

Michael Allaby.

in A Dictionary of Geology and Earth Sciences

January 2013; p ublished online September 2013 .

Reference Entry. Subjects: Earth Sciences and Geography. 122 words.

Primitive *pteridophytes, which were the earliest vascular plants, from the *Silurian and the *Devonian. They had slender, tapering, leafless or scale-bearing stems up to 50cm high, often...

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Psilophytales

Edited by Michael Allaby.

in A Dictionary of Plant Sciences

January 2006; p ublished online January 2006 .

Reference Entry. Subjects: Plant Sciences and Forestry. 67 words.

Primitive pteridophytes, which were the earliest vascular plants, from the Silurian and Devonian. They had slender, tapering, leafless,

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Psilophytales

Edited by Michael Allaby.

in A Dictionary of Plant Sciences

March 2019; p ublished online March 2019 .

Reference Entry. Subjects: Plant Sciences and Forestry; Plant Physiology. 75 words.

An order of primitive *pteridophytes, which were the earliest vascular plants, from the *Silurian and *Devonian. They had slender, tapering, leafless, or scale-bearing stems up to 50 cm...

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Psilophytales

Michael Allaby.

in A Dictionary of Plant Sciences

January 2012; p ublished online April 2013 .

Reference Entry. Subjects: Plant Sciences and Forestry. 67 words.

Primitive pteridophytes, which were the earliest vascular plants, from the Silurian and Devonian. They had slender, tapering, leafless, or scale-bearing stems up to 50 cm high, often with...

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<i>Zosterophyllum</i>

Edited by MICHAEL ALLABY.

in A Dictionary of Earth Sciences

January 2008; p ublished online January 2008 .

Reference Entry. Subjects: Earth Sciences and Geography. 33 words.

A Lower Devonian psilopsid plant (Psilophytales) whose lower parts underwent H-branching, producing a tufted growth habit. Erect branches

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Pteridophytina

Edited by MICHAEL ALLABY.

in A Dictionary of Earth Sciences

January 2008; p ublished online January 2008 .

Reference Entry. Subjects: Earth Sciences and Geography. 191 words.

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

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pre-ferns

Edited by MICHAEL ALLABY.

in A Dictionary of Earth Sciences

January 2008; p ublished online January 2008 .

Reference Entry. Subjects: Earth Sciences and Geography. 46 words.

A group of plants transitional between the Psilophytales and the true ferns, having some fern and some psilophyte characters. They

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Pteridophytina

Michael Allaby.

in A Dictionary of Geology and Earth Sciences

January 2013; p ublished online September 2013 .

Reference Entry. Subjects: Earth Sciences and Geography. 201 words.

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

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pre-ferns

Michael Allaby.

in A Dictionary of Geology and Earth Sciences

January 2013; p ublished online September 2013 .

Reference Entry. Subjects: Earth Sciences and Geography. 48 words.

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 ...

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Zosterophyllum

Michael Allaby.

in A Dictionary of Geology and Earth Sciences

January 2013; p ublished online September 2013 .

Reference Entry. Subjects: Earth Sciences and Geography. 38 words.

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

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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

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...

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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...

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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...

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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...

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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