Hypertext Webster Gateway: "prothalli"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Prothallus \Pro*thal"lus\, n.; pl. {Prothalli}. [NL., fr. Gr. ?
before + ? a young shoot.] (Bot.)
The minute primary growth from the spore of ferns and other
Pteridophyta, which bears the true sexual organs; the
o["o]phoric generation of ferns, etc.
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