progymnosperm

English

Etymology

From pro- +‎ gymnosperm.

Noun

progymnosperm (plural progymnosperms)

1. (biology) A very early form of plant that produced both wood (like trees) and spores (like ferns).
   • 1991, Transactions of the Royal Society of Edinburgh: Earth sciences, page 122:

     Pycnoxylic wood is a primitive feature of progymnosperms with regard to manoxylic wood with wide and high rays.