Phycologia australica; or, A history of Australian sea weeds ..and a synopsis of all known Australian Algae .. . ecognized under every form; but one is broad andscarcely cleft; another narrow, and cut up into innumerableshreds; and others, like the one selected for our figure, are mo-derately lobed. This plant abounds in all parts of the western and southerncoast that I have visited. In Tasmania a variety occurs, inthe Tamar, a considerable way above Georgetown, and at firstlooks like a different species, being thinner, and more purpleand fan-shaped than the ordinary state. On tracing it down
Phycologia australica; or, A history of Australian sea weeds ..and a synopsis of all known Australian Algae .. . ecognized under every form; but one is broad andscarcely cleft; another narrow, and cut up into innumerableshreds; and others, like the one selected for our figure, are mo-derately lobed. This plant abounds in all parts of the western and southerncoast that I have visited. In Tasmania a variety occurs, inthe Tamar, a considerable way above Georgetown, and at firstlooks like a different species, being thinner, and more purpleand fan-shaped than the ordinary state. On tracing it down theriver to the Heads of Port Dairymple, it gradually blends intothe usual variety, nor is there any microscopic character to dis-tinguish it. Fig. 1. Halopleoma Preissit; part of a frond,—the natural size. 3. Someof the vertical, anastomosing, central filaments, and the horizontal, free,superficial ramuli; showing their connection. 3. Eamulus, with tetra-spores. 4. A tetraspore. 5. An involucrated cluster of favellse. 6. A fa-vella. 7. Spores:—the latter figures >«tfy»i/?ec?. l:^itili> ?OOiiS, J-LILIC Ser. Rhodosperme^. Fam. Sjjharococcoidea. Plate LXXX. GRACILARIA DACTYLOIDES, Sond. Gen. Chae. Frond filiform, compressed, or flat, cartilaginous, irregularlybranched, composed of two strata; the medullary stratum of large,roundish, angular cells, smaller outwards, usually containing granules;the cortical of minute cellules, vertically seriated or in a single : 1, hemispherical or conoidal conceptacles, sessile onthe branches, containing within a thick pericarp obovate sjjores ar-ranged in spore-threads issuing from a basal placenta; 2, tetrasporescruciate or tripartite, dispersed among the surface-cellules of thebranches and ramuli.—Gracilaria {Grev.), hom gracilis, slender/applicable to the filiform species. Trans filifor mis, compressa, v. plana, carnoso-cartilaginea, vage ramosa, ex atratisdtiobus contexta. Stratum medullare cellulis
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Keywords: ., bookauthorharveywi, bookcentury1800, bookdecade1850, bookyear1859
