. Elementary botany. Botany. Fig. 221. Male pro thallium of a fern (niphobolus), in form of an alga or protonema. Spermato- zoids escaping from antheridia. sexual organs, for these are borne in most cases on the under side. 372. Antheridia.—If we search among the rhizoids we will see small rounded elevations as shown in fig. 214 or 222 scat-. Fig. 222. Male prothallium of fern (niphobolus), showing opened and unopened antheridia; 39, sec- tion oi unopened antheridium; y>. spermatozoids es< aping; 41, spermatozoids which did not e < ape from the Please note that these ima
. Elementary botany. Botany. Fig. 221. Male pro thallium of a fern (niphobolus), in form of an alga or protonema. Spermato- zoids escaping from antheridia. sexual organs, for these are borne in most cases on the under side. 372. Antheridia.—If we search among the rhizoids we will see small rounded elevations as shown in fig. 214 or 222 scat-. Fig. 222. Male prothallium of fern (niphobolus), showing opened and unopened antheridia; 39, sec- tion oi unopened antheridium; y>. spermatozoids es< aping; 41, spermatozoids which did not e < ape from the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Atkinson, George Francis, 1854-1918. New York, H. Holt and company
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