English[edit]
Etymology[edit]
pro- + gymnosperm
progymnosperm (plural progymnosperms)
- (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.