Alga.] CALIFORNIA. 168 



Ord. LIV. HEPATIC J£. Juss. 

 1. Marchantia polymorpha. Linn. 

 1. Jungermannia platyphylla. Linn. 



Ord. LV. LICHENES. Ach. 



1. Parmelia enteromorpha ; albo-virescens, thallo substellato laciniis lato-linearibus elon- 

 gatis flexuosis repetitim ramosis inflatis subtus aterrimis, apotheciis infundibuliformibus disco 

 flavo-fusco. Hook.— Parmelia enteromorpha. Ach. Lich. Univ. p. 494. Ejusd. Syn. Lich. 

 p. 219. Hook. Bot. Misc. v. 1. p. 127. t. 33. Sm. MSS. 



The venerable and indefatigable Menzies was the first to discover this singular Lichen, on the North- 

 West coast of America, where Mr. Douglas and Dr. Scouler also found it. 



2. Parmelia caperata. Ach. 



This is mixed with some of the other Lichens, among which it appears to have grown. 

 1. Cetraria juniperina. Ach. 



1. Cenomyce fimbriata; b. radiata. Ach. Syn. p. 255. 



2. Cenomyce pyxidata. Ach. 



1. Ramalina scopulorum. Ach. — var. tenuissima. 



2. Ramalina homalea; thallo compresso ancipiti lasvigato nudo ramoso albo-pallescente 

 transversim subrimoso, ramis dichotomis attenuatis, apotheciis sparsis centro afExis conca- 

 viusculis subimmarginatis concoloribus. Ach. Syn. p. 294. 



1. Usnea barbata. Ach. 



Ord. LVL ALG^.* 

 Trib. I. Fucoide^;. 



1. Fucus vesiculosus. £. Sherardi. Turn. — Ag. Syst. 276. 



2. Fucusfurcatus. Ag. Syst. 279. 



Trib. II. Laminarie^e. 



1. Macrocystis Menziesii. Ag. — Fucus Menziesii. Turn. Hist. Fuc. t. 27. 



2. Macrocystis obtusa. Harv. MSS.; caule compresso, foliis alternis oblongo-ellipticis 

 obtusis integerrimis e vesiculis (petiolatis) ovatis. 



Leaves two to three inches long, olivaceous, quite entire, membranaceous, translucid, the surface smooth 

 and even. 



Trib. III. Floride^e. 

 1. Delesseria platycarpa. Lamour. — Fucus platycarpus. Turn. t. 144. 

 1. Nitophyllum laceratum; y. palmatum. Harv. MSS. 



By W. H. Harvey, Esq. 

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