. Algæ. Vol. I. Myxophyceæ, Peridinieæ, Bacillarieæ, Chlorophyceæ, together with a brief summary of the occurrence and distribution of freshwat4er Algæ . B Fig. 190. Draparnaldia platy-zonata Hazen. A, small portionof plant, x 70. B, single cell ofmain filament showing the re-ticulated chloroplast, x 180.(From a specimen collected inBritish Columbia by Mr F. ) Chaetophorese 297 in the young plants of the larger genera. The zoogonidia of Stigeocloniumand Chietopliora often develop in masses, and in many instances the adultthallus is really a colony of plants which have grown intermin
. Algæ. Vol. I. Myxophyceæ, Peridinieæ, Bacillarieæ, Chlorophyceæ, together with a brief summary of the occurrence and distribution of freshwat4er Algæ . B Fig. 190. Draparnaldia platy-zonata Hazen. A, small portionof plant, x 70. B, single cell ofmain filament showing the re-ticulated chloroplast, x 180.(From a specimen collected inBritish Columbia by Mr F. ) Chaetophorese 297 in the young plants of the larger genera. The zoogonidia of Stigeocloniumand Chietopliora often develop in masses, and in many instances the adultthallus is really a colony of plants which have grown Fig. 191. A, Bulbocoleon piliferum Pringsh. x 240. Only the bases of the bulbous bristles areshown ; on the left is a zoogonidangiurn (zg). B, small portion of plant of Acrochsete repensPringsh. x 420. C, single plaut of Tltumniochsete Hubert Gay attached to filament ofOscillatoria sp. x 700. (A and B, after Pringsheim ; C, after Gay.) The genera are : Chs-tophora Schrank, 1789 ; Draparnaldia Bory, 1808 ; StigeocloniumKiitzing, 18431 [=My3Conema, Fries, 1825; and inclus. Iwanoffia Pascher, 1906];Acrochsete Pringsheim, 1862 ; Bulbocoleon Pringsheim, 1862 ; Chsetonema Nowakowski,1876 ; Ph&ophila Hauck, 1876; Etidodonium Szymanski, 1878 ; Thamniochsete Gay,1893 ; Pseudochsete W. & G. S. West, 1902 ; Fridaea Schmidle, 1905 ; Ectochtete (Huber)Wille, 1909 ; Trichodiscus Welsford, 1912 ; Didymosporangium Lambert, 1912. As pointed out by Huber (93), Endodonium is so closely related to Stigeoclonium as a cement. This he has also observed in young plants of (Edogonium and in CharaciumS
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