664 
IX. ALGiE. 
[ Rytiphlcea . 
A genus of both temperate zones. — Scarcely different from Rhodomela, or from the 
opaque series of Polysiphonia, Harv. Ner. Austr. 31. 
1. R. delicatula, Hook. f. and Harv. FI. N. Z. ii. 224. t. 112 D. 
Frond tufted, setaceous, 2 in. high, distichously pinnate above, pellucidly 
striate ■> branches corymbose and fastigiate, again pinnate or 2-pinnate, 
margined with subulate spreading branchlets, which are crowded towards the 
tips ; axis of 4 large tubes surrounding a central one, all coated with smaller 
cells. Conceptacles ovoid, sessile on the larger pinnae. 
Cook’s Straits and Akaroa, Lyall. 
R. pinastroid.es, J. Ag. — A European plant, has been erroneously stated to be a native of 
New Zealand. See FI. N. Z. ii. 222. 
37. RHODOMELA, Agardh. 
Frond dull red, terete, dendroid, inarticulate, solid, coated with minute 
polygonal coloured cells ; axis articulate, of many large colourless tubular 
cells. Conceptacles enclosing a tuft of pyriform spores. Stichidia formed 
of swollen branchlets, and enclosing one or several rows of tetraspores. 
Natives of both temperate zones. 
1. R. Gaimardi, Ag. ; — FI. N. Z. ii. 225. Frond cylindric, setaceous, 
dark coloured, 4-6 in. high, simple below, above divided into 3-4 principal 
branches, which are subdichotomous or irregular, repeatedly 2-fariously 
branched ; secondary and tertiary long, subsimple, loosely set with short 
branchlets, which are in. long, slender, and often secund. — FI. Antarct. 
481. t. 184 ; Harv. Ner. Austr. 35. F. Hookeriana, J. Ag. Sp. Alg. ii. 880. 
Hawke’s Bay, Colenso, to Akaroa, Lyall, probably common. (Fuegia and the Falkland 
Islands.) 
2. R. caespitosa, Harv. in FI. N. Z. ii. 225. Frond 2 in. high and 
upwards, densely tufted ; stem naked below, setaceous, very slender, forked ; 
branches alternately decompound above, subfastigiate, arcuate ; branchlets 
scattered, secund, or alternate ; ultimate linear, subulate, arcuate, acute, 
coated with small cells, opaque under the microscope. Axial tubes 4, their 
joints visible externally. Stichidia densely crowded on the sides of the 
upper branches, linear-subulate, simple or branched, with one series of tetra- 
spores. 
Rocks near low-water mark, Parimahu,etc., Colenso. — “ Colour bright emerald-green,” Col. 
3. R. concinna. Hook./, and Harv. FI. N. Z. ii. 225. t. 111. Root a 
woolly disk. Frond 8-12 in. high, opaque, as thick as a sparrow’s quill, 
ovate in outline, repeatedly distichously pinnate ; main lower branches sub- 
horizontal, upper spreading, pinnately decompound ; penultimate pinnae |-1|- 
in. long, close-set with uniform alternate dichotomously multifid pinnules, 
jJj — \ in. long, which are inserted distichously, but themselves branch in all 
directions, the branchlets spinous. Stichidia sessile, oblong, acute. Tetra- 
spores in several series. 
Foveaux Straits and Chalky Bay, Lyall. 
