What's the difference between macrosporangium and oophoridium?
Macrosporangium
Definition:
(n.) A sporangium or conceptacle containing only large spores; -- opposed to microsporangium. Both are found in the genera Selaginella, Isoctes, and Marsilia, plants remotely allied to ferns.
Example Sentences:
Oophoridium
Definition:
(n.) The macrosporangium or case for the larger kind of spores in heterosporous flowerless plants.