prothallus
Pro*thal"lus, n.; pl. Prothalli. Etym: [NL., fr. Gr. (Bot.) Defn: The minute primary growth from the spore of ferns and other Pteridophyta, which bears the true sexual organs; the oöphoric generation of ferns, etc.
Pro*thal"lus, n.; pl. Prothalli. Etym: [NL., fr. Gr. (Bot.) Defn: The minute primary growth from the spore of ferns and other Pteridophyta, which bears the true sexual organs; the oöphoric generation of ferns, etc.