ON CALIFORNIAN MOSSES. 11 



differt : foliis versus apiccm subdontatis (nee intcgcrrimis) peristoiniiquo dcntibus tantum articulatis (nee no- 

 dosis, ncc linca media exaratis). 



Wet rocks near the Bay of San Francisco. April. 



57. PIIYSCOMITRIUM pyriformc Br!d. 



On swampy ground, Marin County. April. Scarcely ripe. . ' 



58. FONTINALIS Califoruica Sal. Hot. of the Ex. 

 In a willow swamp near San Rafael. April. 



59. ANTITRICHIA Californica Sul. JUSS. Antitricbiao curti pendulyc proxima diffcrt : ramis breviorilms 

 julaccis filiforinibus vc; foliis in sicco arete eoinprcssis, brevius acuminatis vix dentatis, areolatione densiori ; 

 capsula cylindrica longiore rubella; pedicello brevioro recto; peristomii dcntibus laxius et obscure articulatis; sporis 

 duplo minoribus ; perichsetialiis longius lanceolato-acuminatis dentatis ; vaginula crassiore. 



On oak trees near San Francisco. Mr. Sullivant, in Botany of Whipple's Expedition, 

 considered this species as different ; but the specimens of the Expedition were without 

 fruit, and thus it could not be exactly determined. 



60. FABRONIA p u s i 1 1 a Ruthll. 

 On oak trees, San Francisco. 



61. PTEROGOMUM gracilc ILeilw. 

 Leptoltymcnium cltiplicato-serralum limp. 



Mr. Hampe has made a new species of our. Californian moss; but after a close examina- 

 tion of a large number of specimens, I do not find any difference between the European 

 species aild ours, except perhaps a little larger annulus for this last. The character th,ken 

 from the size of the plant is unreliable ; some Californian specimens being larger than any 

 of those which I have from Europe, and the serrature of the leaves appears just the same 

 in both forms. On rocks near the Bay of San Francisco. Common. 



G'2. ALSIA circinata Sul. Iconc.s Muse. tab. 72 b ined. 

 Leptodon circinatus Sul. in Whipple's Expedition. 



Dr. Bigelow's collection had only male plants of this species, which by leaves and rami- 

 fication is closely allied to the genus Le[>todon. Mr. Bolandcr has collected it with ripe 

 capsules, and the peristomc shows the species to be a true Alsla. On oak trees near San 

 Francisco. 



63. ALSIA Californica Sul. 



On trees, rocks, &c. Common. 



64. HYPNUM crispifolium Hook. Muse. exot. 

 Ilypnum (Thuidivtn) ramulosum Hampe in I'M. C. Mull. 



Though Hooker's figure and description of this species arc not satisfactory, the essential 



