Reference Entry


Michael Allaby

in A Dictionary of Plant Sciences

Third edition

Published in print January 2012 | ISBN: 9780199600571
Published online April 2013 | e-ISBN: 9780191759147

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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 cone-shaped ...

Reference Entry.  67 words. 

Subjects: Plant Sciences and Forestry

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