Phycologia britannica, or, A History of British sea-weeds, containing coloured figures, generic and specific characters, synonymes, and descriptions of all the species of algae inhabiting the shores of the British Islands . marked, it is moreslender than the typical form of that species, its branches areless frequently divided, the ramuli longer, more distant andsimple, the joints longer, and the substance less firm and rigid. Still specimens frequently occur which seem to connect thetwo. This species was discovered by the late Professor Mertens, onthe coast of Holland, about the close of the
Phycologia britannica, or, A History of British sea-weeds, containing coloured figures, generic and specific characters, synonymes, and descriptions of all the species of algae inhabiting the shores of the British Islands . marked, it is moreslender than the typical form of that species, its branches areless frequently divided, the ramuli longer, more distant andsimple, the joints longer, and the substance less firm and rigid. Still specimens frequently occur which seem to connect thetwo. This species was discovered by the late Professor Mertens, onthe coast of Holland, about the close of the last century, and firstpublished by Roth, in his Catalecta. Mr. Dillwyn soon after-wards detected it near Swansea. It does not appear to be uncom-mon on the rocky parts of our shores, growing generally in clearwater, and most frequently in deep pools near low-water under water it has much of the glaucous colour of ; sometimes it occurs of a darker green, and then ap-proaches some of the less branched forms of C. rupestris, but isa larger and stronger growing plant. Fig. 1. Cladophora diffusa:—of tlie natural size. 2. Part of a Apex of a branchlet:—both magnified. Ser. Chlorosperme i Fam. Confervece. Plate NUDA, Harv. Gen. Char. Filaments green, attached, uniform, branched, composed ofa single series of cells or articulations. Fruit, aggregated granulesor zoospores, contained in the articulations, having, at some period,a proper ciliary motion. Cladophora {Kiitz),—from kXoBos, a branch,and opea>, to bear. Cladophora nuda; filaments somewhat rigid, slender, very straight, dull-green, or olivaceous (when dry), sparingly dichotomous; ramuli fewand scattered, appressed, the uppermost often opposite; articulationsmany times longer than nuda, Mare. Man. ed. 2. p. 101. Conferva nuda, Harv. in Mack. Fl. Hib. part 3. p. 229. Harv. Man. ed. 136. Hab. On basalt rocks, between tide-marks. At P
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Keywords: ., bookauthorharveywilliamhwilliam, bookcentury1800, bookdecade1840
