54 SOUTHERN CALIFORNIA ACADEMY OF SCIENCES 



Placodmm microphillum, Tuck. On dead wood, SMR. 



" coralloides, Tuck. Santa Barbara Island. (Trask.) 



" epixanthuni, Nyl. Rocks. Palm Springs. SMR. 



very similar to P. vitellinnm ; the disk is green- 

 ish yellow, with a paler yellow margin, and 

 the asci contain eight spores, simple and po- 

 lari bilocular. 

 " candicans, Schaer. Cr. I.e. Argillaceous rock, 



SMR. 

 " teicholytum, Ach. Cr. I.e. Calcareous rock, SMR. 



Lecanora atrynea, Nyl. Cr. I.e. Rocks, San Gabriel Mts. This 

 is one of the confusing L. subfusca group which 

 Nylauder has split into a number of species, var- 

 ieties and forms based upon differing chemical 

 thalline reactions, structure of the paraphyses, 

 etc., but which seem more or less to intermingle. 

 " varia polytropha, Nyl. Tuck. Syn. N. A. Li. (L 



polytropa, Nyl. Cr. I.e.) Rocks, SMR. 

 " gyalectodes, Nyl. Calcareous rock Malibu Canon, 

 SMR. This species was diagnosed by Dr. Ny- 

 lander in 1899, but I have seen no description. 

 The thallus forms a mealy white crust. Apothe 

 cia are- urceolate with a white pulverlent thal- 

 line margin, thick, entire or radiously crenate. 

 Disk convex, orange colored. Spores in 8's, col- 

 orless, muriform, oblong ovate. 2-4mm. long \>ij 

 12mm. thick. 



The Lichen-flora of San Clemente Island. 



BY DR. H. E. HASSE. 



Ramalina I\Ienziesii. Tuck. On Heteromeles. 



" combeoides, Nyl. 



" ceruchis, Ach. DeNot. f. cephalota, Auctt. 



" calicaris farinacea, Schaer. 



" reticulata, Noehd. Kremp. On Quercus. 



Dendrographa leucophaea, Tuck. Darbish. 

 Physcia erinacea, (Ach.) Tuck. 

 Usnea hirta, Hoffm. Sterile. 

 Schizopelte Californica, Th. Fr. 

 Placodium coralloides Tuck. Rocks near the beach. 



" sp., undetermined. 



" ferrugineum, Huds. Hepp. 



" aurantiacum, (Lightf.), Naeg and Hepp. 



Lecanora pallida, (Schreb), Schaer. 

 " subfusca, (L.), Ach. 

 varia, (Ehrh.), NyL 

 " Roboris Nyl, (Rinodina confragosa.) On oak. 



