408 CALIFORNIA.— SUPPLEMENT. [Alga. 



1. Plocamium coccineum, Lyngb.— Fucus coccineus, Turn. Hist. t. 59. Harv. supra, 

 p. 163. 



San Francisco. i> Sinclair. 



1. Rhodomenia polycarpa, Grev. Crypt. Fl. t. 352. ifam sapra, p. 164. 



STENOGRAMMA. Harv.— {Gen. Nov.) 

 From membranacea, rubra, plana, enervis. Fructificatio : 1.-? 2. receptacula linearia, nerviformia. in 

 frondem sessilia, granulis minutissimis repleta. 



1. S. Californicum, Harv. 



Root unknown. Stem minute, cylindrical, gradually expanding into a broadly cuneate, dichotomously cleft, 

 flat, membranaceous frond about six inches long ; the segments cuneate, about half an inch broad, obtuse at 

 the apices ; the axils rounded. Margin entire, bearing here and there linear-oblong or slightly lanceolate 

 leaflets (which perhaps in older specimens become dichotomously cleft?) Fruit, so far as known, cons.sts 

 in linear, dark-red, elevated receptacles, not half a line in breadth, and from half an inch to upwards of an 

 inch in length, extending longitudinally through the centre of the terminal segments, or of the marginal leaf- 

 lets, and resembling a very strong prominent rib. These receptacles are completely filled with a dense mass 

 of minute granules, their coat or periphery is opaque and resembles that of the frond. Colour a full red ; sub- 

 stance membranaceous ; reticulation minute. 



Hab. San Francisco, Br Sinclair.— A single specimen only of this very remarkable plant exists in the 

 herbarium, and on it I have ventured to establish a new genus. In habit it so closely resembles Phyllo- 

 phora rubens, that it might easily be passed over as that plant. But the fructification is not only totally 

 different from that of Phyllophora, but resembles nothing with which I am acquainted among the Alga*, 

 while it bears a striking resemblance to the lirellce of the genus Opegrapha, among Lichenes. From the 

 minute size of the sporules contained in the mass with which the receptacles are full, I am induced to con- 

 sider these curious bodies as secondary fructification, the primary being probably sphasrical capsules. The 

 affinities of the genus are with Phyllophora. 



1. Lauren cia pinnatifida, Lamour — Fucus pinnatifidus. Turn. Hist. t. 21. 



Monterrey, Douglas. 



1. Chondrus vermicularis? Grev. — Fucus vermicularis. Turn. Hist. t. 221. Harv. 

 supra, p. 164. 



Monterrey, Douglas. 



2. C. affinis (Harv.); fronde plana dichotoma, segmentis cuneatis, margine subinflexo, 

 capsulis sphsericis sparsis. 



1-2 inches high, dark purple, densely tufted. It is allied to C. crispus, but differs in the sphserical capsules 

 abundantly scattered over the frond and prominent on both surfaces, and in having the margin somewhat 

 inflexed ; by which latter character it approaches C. canaliculars, but in that species the capsules are 

 marginal. 



1. Gelidium corneum, Lamour.— Fucus corneus. Turn. Hist. t. 257. Harv. supra, p. 164. 



San Francisco, Dr Sinclair. Monterrey, Douglas. Two varieties exist in the herbarium. 



