Assertion: moss's gametophyte | /r/CapableOf | call prothallus
Facets:
Source sentences:
text: In most ferns, for example, in the leptosporangiate fern Dryopteris, the gametophyte is a photosynthetic free living autotrophic organism called a prothallus that produces gametes and maintains the sporophyte during its early multicellular development.