medullosalean
English
Etymology
Medullosales + -an
Noun
medullosalean (plural medullosaleans)
- (botany) Any of the order Medullosales of pteridospermous seed plants characterised by large radiospermic ovules with a vascularised nucellus, complex pollen-organs, stems and rachises with a dissected stele, and frond-like leaves.