. Elementary 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-

---

Size: 4026px × 1242px
Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookcentury1800, bookdecade1890, bookpublisher, booksubjectbotany