186 
MOSSES AND LIVERWORTS. 
B. chloronotos, Schultz ; Bryol. Europ. Barb, monogr., p. 18, t. 4. Hab. same as the last. 
B. eallax, Hedw.; Bryol. Europ. Barb, monogr., p. 23, t. 9. Cajon Pass, Sierra Nevada; 
also near San Francisco. 
B. braciiypiiylla, (sp. nov.) : dioica ; dense caespitosa ; caule fastigiato-ramosa ; foliis paten- 
tibus ovatis breviter obtuse acuminatis toto margine recurvis usque ad apicem valido-costatis ; 
capsula cylindracea erecta ; perist. dentibus vix contortis e membrana basilari perangusta ortis; 
annulo simplici; operculo longe rostrato ; calyptra brevi. Near Benicia. Steins 8-12 lines 
high, rooting profusely their entire length, and branching from below the floral apex. Leaves 
dark, brownish green, of a firm, thick texture ; cellules minute sub-quadrate. Pedicel 5-7 lines 
high, red. Teeth of the peristome contorted scarcely half-way round. This species has the habit 
and aspect of a Tricbostomum, particularly of T. rigidum, but each of the 32 teeth of its peris¬ 
tome consists of two conjoined lines of tubular cellules, one placed before the other. (Plate II.) 
B. vinealis, Brid.; Bryol. Europ. Barb, monogr., p. 24, t. 10. Oakland, opposite San Fran¬ 
cisco ; also Sonora. 
B. semitorta, (sp. nov.) : dioica ; laxe cmspitosa ; caulibus subsimplicibus bad solum radi- 
cantibus apice congesto-foliosis ; foliis e basi erecta amplexante horizontalibus lineari-lanceolatis 
concavis margine planis, costa solida cum apice desinente ; capsula cylindracea erecta aciculari- 
ope-rculata, anguste annulata ; perist. dentibus longiusculis semitortis ; calyptra vix infra oper¬ 
culum descendente. Growing with the last species, which it resembles, but has a shorter 
calyptra, longer operculum, and less contorted peristome, with a narrower basal membrane. Its 
leaves are more tufted at the top of the stems, squarrose-spreading, gradually tapering from 
near their base, (not suddenly and long acuminated,) with margins nowhere recurved ; areola- 
tion much larger. (Plate III.) 
B. convoluta, Hedw.; Bryol. Europ. Barb, monogr., p. 29, t. 16.—Oakland, opposite San 
Francisco. 
B. Vaiiliana, Sclmltz; Bryol. Europ. Barb, monogr.,p. 33, t. 18.—Cajon Pass, Sierra Nevada; 
also near Los Angeles. 
B. marginata, Bryol. Europ. Barb, monogr., p. 33, t. 19.—Dry rocky places, common. 
B. subulata, Brid.; Bryol. Europ. Barb, monogr., p. 36, t. 21 and 22.—Dry ravines on Bill 
Williams’ fork of the Rio Colorado, near the mouth of Santa Maria creek. 
B. inermis, Mont.; Byrd. Europ. Barb, monogr., Suppl. 3.—At the base of a mountain fifty 
miles west of the Rio Colorado in the line of the survey. 
B ruralis, Hediv.; Bryol. Europ. Barb, monogr., p. 43, t. 27.—Cajon Pass, Sierra Nevada. 
B. Mulleri, Bryol. Europ. Barb, monogr., p. 44, t. 28.—Various localities ; appears to be a 
common species. 
POTTIEAE. 
Pottia subsessilis. Bryol. Europ. Pott, monogr., p. 6, t. 1.—Los Angeles. 
P. minutula, Bryol. Europ. Pott, monogr., p. 8, t. 3.—Growing with the last. 
orthotricheae. 
Ortiiotrichum Lyellii. Hook.; Bryol. Europ). Ortliot. monogr., p. 27, t. 16.—Growing on 
trees ; not uncommon in California and Oregon. Differs from the European form in its longer 
and narrower leaves, more undulate on the margins, and more contorted when dry. The 
articulated gland-like bodies, (Converfa Orthotrichi,) so frequent on the leaves of European 
specimens, are seldom present on the Californian. It is the var. foliis longioribus siccitate 
magis crispatis, {Brid. Bryol. Univ. 1 ,p. 728.) founded on specimens collected by Menzies at 
Nootka Sound. 
In the collection are imperfect specimens of another Orthotrichum gathered at the crossing 
of the Colorado, growing with Scliistidium apocarpum, and also on rocks at Lereux’s spring, 
