PlaU cum .
W . H H . i U l et I i£ L Rm’ï.JleDÎiam. àRcevo
Ser. R h o d o s p e rm eæ . ïam . Bhodomelea.
P l a t e CLXXII.
POLYSIPHONIA ATRO-RUBESCENS, Grev.
Gen . C h a r. Frond filamentous, partially or generally articulate; joints
longitudinally striate, composed of numerous radiating cells or tubes,
disposed round a central cavity. Fructification two-fold, on difterent
individuals; 1, ovate capsules [ceramidia), furnished with a terminal
pore, and containing a tu ft of pear-shaped spores; 2, tetraspores,
imbedded in swoUen branchlets. P o l y s ip h o n ia [Grev) ,—n-oXus, many,
and (Tid>a,v, a tube.
P o l y s ip h o n ia atro-rubeseens ; filaments setaceous, sparingly or much
branched, dark brownish-red, somewhat rigid ; branches long, alternate,
very erect, mostly undivided, usually furnished with a second (or
tlurd) set of lesser branches, naked, or clothed with short, simple or
multifid, scattered, subulate ramuli, winch taper to the base and apex ;
articulations variable, the lower twice or thrice as long as broad, the
upper gradually shorter, marked with several, spirally curved tubes ;
siphons about twelve; capsules broadly ovate or subrotund, sessile,
nearly or quite terminal ; tetraspores imbedded in multifid ramuli.
P o l y s iph o n ia atro-rubesoens, Grev. M. M in . p. 308. Hook. Br. FI. vol. ii.
p. 831. Harv. in Mack. FI. Hih. part 3. Harv. Man. p. 87. Harv. Ner.
Aust. p. 53. Kiitz. Fhyc. Gen. p. 434. Endl. 'ird Suppl. p. 45.
P o l y s iph o n ia Agardhiana, Grev. Scot. Crypt. FI. t. 310. Flarv. in Hook.
Alg. Banm. no. 134. Fhyc. Gen.
383. Endl. 3rd
'. Hyd. Ban. p. 110. Ag. Sp. Alg. vol. ii.
Alg. vol. ii. p. 66.
56. Lgngb. Hyd. Ban. p. 114. Ag. Syst.
Br. El. vol. ii. p. 331.
p. 430. Endl. p. 45.
P o l y s ip h o n ia badia, Grev. Hook. Br. El. vol. ii. p. 331.
P o l y s iph o n ia denudata, Grev. Hook. Br. El. vol. ii. p.
Suppl. p. 45.
H u t c h i n s i a atro-rubescens,
p. 64.
H u t c h in s ia Agardhiana, Ag.
H u t c h in s ia badia, Ag. Syn
p. 155. Ag. Sp. Alg. vol. ii. p. 74.
H u t c h in s ia denudata, Ag. Sp. Alg. vol. ii. p. 73.
C o n f e r v a nigra, Huds. El. Ang. p. 595. Billw. Syn. no. 163. E. Bot. t. 3340.
C o n fe r v a atro-rubescens, Billw. t. 70.
C o n f e r v a badia, Billw, Syn. no. 161. t. G.
C o n f e r v a denudata, Billw. Syn. no. 160. t. G.
H a b . On rooks and stones in the sea, near low-water mark. Annual.
Summer and autumn. Not uncommon.
G e o g r . D is t r . Atlantic coasts of Europe and North America. Falkland Islands,
Br. Hooker. Cape of Good Hope, W. H. H.
D e s c r . Hoot scutate. Eronds densely tufted, from three to twelve inches in
N 2
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