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 . Jiora arcta abounds on all our rocky shores, and ap-pears to be equally common throughout the Northern Hooker also collected it in abundance at the FalklandIslands, and very probably it is distributed as abundantly inall southern latitudes with a similar climate. I believe that italways grows upon rocks, within the range of the tide, but nearlyat the limit of l
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 . Jiora arcta abounds on all our rocky shores, and ap-pears to be equally common throughout the Northern Hooker also collected it in abundance at the FalklandIslands, and very probably it is distributed as abundantly inall southern latitudes with a similar climate. I believe that italways grows upon rocks, within the range of the tide, but nearlyat the limit of low water, and in such places it frequently coversa considerable surface. When young, its colour is peculiarlyvivid, and its aspect silky; but as it progresses, the bright colouris more and more confined to the top branches, and the lowerpart of the frond becomes coarse and woolly. The species most nearly allied to C. arcta, are C. uncialis, andC. lanosa, both of which are of much smaller size. Fig. 1. Cladophoua arcta; in a young state. 2. The same, later in theseason:—both of the natural size. 3. Portion of a filament. 4. Joints from the lower part of a filament:—all more or less magnified. Plate Scr. Chlorosperme^e. Fam. Confervea. Plate CXCVI. CLADOPHORA GLAUCESCENS, Griff. Gen. Char. Filaments green, jointed, uniform, branched. Fruit, aggre-gated granules or zoospores, contained in the joints, having, at someperiod, a proper ciliary motion. Cladophora (Kiitz.),— fromxXaSoy, a branch, and opea>, to bear. Cladophora glaucescens; tufts dense, glaucous-green, subfastigiate; fila-ments very slender, flexuous, excessively branched; branches rafherstraight, erect, or erecto-patent, the lesser ones furnished with close,very erect, straight, elongated ramuli: articulations nearly uniform,about thrice as long as broad. Conferva glaucescens, Griff, in Wyattl Alg. Danm. no. 195. Harv. 139. Hab. On rocks and stones, between tide marks. Annual.
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Keywords: ., bookauthorharveywilliamhwilliam, bookcentury1800, bookdecade1840
