progymnosperm en · NOUN
Etymology
From pro- + gymnosperm.
Meanings
-
A very early form of plant that produced both wood (like trees) and spores (like ferns).
Pycnoxylic wood is a primitive feature of progymnosperms with regard to manoxylic wood with wide and high rays.
1991, Transactions of the Royal Society of Edinburgh: Earth sciences, page 122:
Forms
| Spelling | Features | Labels | Source |
|---|---|---|---|
| progymnosperms | Number=Plur | lexicographic |