188 MOSSES AND LIVERWORTS. 



pedicellata sub pendula pyriformi-elliptica : flore masculo terminali capituliformi. Banks of 

 streams above Sonora, base of tbe Sierra Nevada. Tbe dark yellowisb-green of the foliage ; 

 tbe shorter, more obtuse, and nearly entire leaves, with a closer areolation ; the less obovate 

 capsule, and the capituliforra male flowers of this species, separate it from B. Wahlenbergii, 

 its nearest < ongener. (Plate V.) 

 x B. ARGENTEUM, Linn.; Btyol., Europ., Bry., monogr., p. 78, t. 41. On rocks, dry ravines, 



fifty miles west of the Rio Colorado, on the line of the survey. 



p. B. CALIFORNICUM, (sp. nov.): dioicum? dense crespitosum ; caule atque innovationibus bre- 

 vissimis bulbiformihus ; foliis inferne dissitis superne majoribus densissime capituliformi- 

 imbricatis concavis subquadrato-ovatis breviter apiculatis, margine subintegerrimis subplanisque, 

 continuo-costatis ; capsula atro-sanguinea oblonga vel oblongo-ovata pendula, collo baud 

 angustiore siccatate rugoso basi obtusato ; operculo minuto hemisphterico ; peristomii dentibus 

 dilute purpurascentibus profunde insertis remotius articulatis, ciliolis singulis brevibus exap- 

 pendiculatis ; annulo magno revolubili. Near Benicia. This species, compared with B. atro- 

 purpureum, has a more compact mode of growth, leaves broader, shorter, less acuminate, and 

 of a subquadrate or obovate-quadrate outline, costa not excurrent, and capsule with a collum 

 as long and as broad as the sporangium. 



In B. versicolor, another nearly allied species, the pedicel at the base of the capsule is more 

 suddenly bent, and the branches somewhat julaceous, with leaves longer, more acuminate, and 

 cuspidate by the excurrent costa. 



B. Californicum is best distinguished from either of these species by its short bulb-like stems 

 and branches, its very small conic-hemisphrerical operculum, and the deep insertion below the 

 rim of the capsule of its peristomial teeth. The inner peristome is seldom well developed. 



B. Blindii has a globose-pyriform capsule, with a" tapering and much smaller collum ; its 

 peristome and the areolation of the leaf are also different. (Plate VI.) 



if fa /tt*f*4*6tfB- OBCONICUM, Hornscli.; Bryol., Europ., Bry., monogr., p. 59, t. 37. Near San Francisco 

 (/ and Napa City. 



Specimens, partly incomplete, of a Bryum collected in Mammoth Tree Grove, on the decayed 

 trunks of trees, may belong to this species. The capsules, however, are shorter and less 

 clavate, and the comal leaves longer and more gradually acuminate, and the habitat, on 

 decayed wood, unusual. 



B. INTERMEDIUM, Brid.; Bryol., Europ., Bry., monogr., p. 47, t. 19. Var. foliis elongato- 

 oblongis sensim acuminatis. No locality given. The capsules are in various stages of develop- 

 ment, as is common in this species. 



B. TORQUESCENS ; Bryol., Europ., Bry., monogr., p. 49, t. 20. Var. foliis latioribus densius 

 areolatis siccis minus contortis. Oakland, opposite San Francisco. 



j. B. OCCIDENTALS, (sp. nov.) : dioicum, brunnescens ; caule brevi inferne defoliate tomentoso 

 superne congesto-folioso ; innovationibus gracilescentibus in media longitudine incrassatis ; 

 foliis ellipticis breviter acuminatis (perichaetialibus oblongo-lanceolatis) costa valida excurrente 

 cuspidatis, decurrentibus margine subintegerrimis vix recurvis, reticulo rhombeo-hexagono 

 cellulis inferioribus subquadratis ; capsula pendula oblonga vel oblongo-obconica macrostoma ; 

 peristomio normali ciliolis ternatim interjectis exappendiculatis ; annulo permagno ; operculo 

 convexo-apiculato : planta mascula graciliore innovando-continua : flore terminali gemmiformi 

 polyphyllo. Near San Francisco. This species is separated from the nearly related B. caaspi- 

 ticium by its erect, appressed, decurrent, scarcely margined leaves, not so acuminate nor so 

 long-cuspidate, by their heavier costa, with a denser texture, composed, in their lower half, of 

 quadrate cellules. It has also an oblong and smaller capsule, with but a slight tendency to a 

 pyriform outline, a wi<Jer and reddish (not yellowish) operculurn, and a larger annulus. (Plate 

 VII.) 



* MNIUM MENZIESII, Hook, in Botanic. Miscell. 1, p. 36, t. 19 ; Hypnum acanthoneuron, Schwcegr. 

 Suppl. t. 258. Common on the coast range of mountains ; fruit rare. 



