ON CALIFORNIAN MOSSES. 11 



differt : foliis versus apicem subdentatis (ncc integcrrimis) pcristomiiquc dentibus tantum artioulatis (ncc no- 

 dosis, noo linca media exaratis). 



Wet rocks near the Bay of San Francisco. April. 



57. Physcomitritjm pyriforme Brid. 



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



58. Eontinalis Oalifornioa Sul. Hot. of the Ex. 

 In a willow swamp near San Bafael. April. 



59. Antitriohia Oalifornioa Sul. MSS. Antitriohira eurti pendulss proxima differt : ramis brevioribus 

 julaccis filiformibus vc; foliis in siceo arete comprcssis, brevius aeuminatis vix dentatis, areolatione donsiori; 

 capsula oylindrica longiorc rubella; pediccllobrovioro recto; peristoma dentibus laxius ct obscure artioulatis; sporis 

 duplo minoribus ; periohsatialiis longius lanceolato-acuminatis dentatis; vaginuhi erassiore. 



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. Eabronia p u s i 1 1 a Raddi. 

 On oak trees, San Francisco. 



61. Pterouonium graoile Eedw. 



Leptolii/mcn ium duplica to-serratum J /m p. 



Mr. Ilampc 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 and ours, except perhaps a little larger annulus for this last. The character taken 

 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. 



62. Alsia o i r o i n a t a Sul. Iconea Muse. tab. 72 b ined. 

 Lcptodon circinatus Sul. in Whipple's Expedition. 



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

 fication is closely allied to the genus Leptodon. Mr. Bolander has collected it with ripe 

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

 Francisco. 



G3. Ar-siA Oalifornioa Sul. 

 On trees, rocks, &c. Common. 



(34. IIyl-niim o r i s pi f ol i u m /look. Muse. exot. 

 Il;/pnum (Thuidium) ramulomm Ilampc. in lill. C. Null. 



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



