. Botany for agricultural students . Botany. Fig. 276. — Portions of two fila- ments of Ectocarpus, showing repro- duction. At s are shown spo- rangia, and between the filaments, a zoospore. At g are shown a game- tangium and a single sperm and two sperms fusing at the right. Redrawn with modifications from Fig. 277. — Plant body of Fucus vesiculosus (X J). In the swollen tips are the con- ceptacles in which the sex organs occur, and at various places occur bladder - like floats. produces a biciliate zoospore-like gamete. After escaping the gametes fuse in pairs and form zygospores. I
. Botany for agricultural students . Botany. Fig. 276. — Portions of two fila- ments of Ectocarpus, showing repro- duction. At s are shown spo- rangia, and between the filaments, a zoospore. At g are shown a game- tangium and a single sperm and two sperms fusing at the right. Redrawn with modifications from Fig. 277. — Plant body of Fucus vesiculosus (X J). In the swollen tips are the con- ceptacles in which the sex organs occur, and at various places occur bladder - like floats. produces a biciliate zoospore-like gamete. After escaping the gametes fuse in pairs and form zygospores. In this plant such gradations occur between sporangia and gametangia and between zoospores and gametes, as to afford considerable support for the theory that gametes are simply zoospores which are too small to function alone. Rockweeds and Gulf weeds (Fucales). — In this order the plant body may reach a meter in length, but is usually much. 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 Martin, John N. (John Nathan), b. 1875. New York : John Wiley & Sons, Inc.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1919
