. Algæ. Vol. I. Myxophyceæ, Peridinieæ, Bacillarieæ, Chlorophyceæ, together with a brief summary of the occurrence and distribution of freshwat4er Algæ . he fixed end of the cellputs out an organ of attachment, which may be simple (fig. 244) or branched(fig. 245 A, and E—H). The nature of this hapteron depends to a greatextent upon the particular species and so also does the degree of tumidity ofthe cell. In most species the basal cell is more or less tumid, but in a few itremains almost cylindrical. The hapteron is in some cases an attaching discand in others a simple or branched rhizoid. The
. Algæ. Vol. I. Myxophyceæ, Peridinieæ, Bacillarieæ, Chlorophyceæ, together with a brief summary of the occurrence and distribution of freshwat4er Algæ . he fixed end of the cellputs out an organ of attachment, which may be simple (fig. 244) or branched(fig. 245 A, and E—H). The nature of this hapteron depends to a greatextent upon the particular species and so also does the degree of tumidity ofthe cell. In most species the basal cell is more or less tumid, but in a few itremains almost cylindrical. The hapteron is in some cases an attaching discand in others a simple or branched rhizoid. The protoplast extends into therhizoid and its branches, but as a general rule the chlorophyll does not. Thedisc-development is generally in those young plants which are attached toa definite substratum (fig. 244 D, E and H), whereas when the young plantsremain free-floating and unattached the rhizoidal development is usuallymost pronounced, and often only a single unbranched rhizoid is developed(fig. 244 F, Q and 7). This unicellular plant has a distinct apical cap, oftenconvex or conical, and sometimes furnished with an apiculus. 390 CEdogoniales.
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishercambridgeengtheuni
