MOSSES AND LIVERWORTS. 
191 
slightly, curved and exannulate capsule, conic operculum, slender pedicel and very long, narrow 
calyptra, descending below the capsule and embracing the pedicel. It resembles small forms of 
H. scitum, Beauv. and H. gracile, Br. & Sch., but differs essentially from both in its calyptra 
and in not having an annulus.— (Plate X.) 
II. noteropiiilum, Sulliv. el Lesqx. Muse. Bor.-Amer. exsiccat., n. 348; Sulliv. in Gray's 
Manuel of Bot., 2 ded.,p. 478. Margins of small streams. 
H. serpens, Linn.; Amblystegium serpens, Bryol. Europ. Amblyst. monogr., p. 9, t. 3. Common. 
H. riparium, Linn.; Amblystegium riparium, Bryol. Europ. Amblyst. monogr., p. 14, t. 8. 
Wet places, frequent. 
II. aduncum, Hedw.; Bryol. Europ. Hyp. monogr., p. 35, t. 24. Grows with the last. 
II. myosuroides, Linn.; Isothecium myosuroides, Brid.; Broyl. Europ. Isothec. monogr., p. 7, 
t. 2. Near San Francisco, dry woods. 
H. Nuttallii, Wils.; Bryol. Brit.,pp. 334 and 339; Sulliv. and Lesqx. Muse. Bor.-Amer. 
exsiccat., n. 3385. On decayed trees, south of San Francisco. 
II. Oreganum, Sulliv. in Mem. Amer. Acad, of Arts and Sci., v. IV, n. ser.,p. 179; Crypto- 
gamia of the U. S. Expl. Expd., t. XIII, ined. In woods, on the ground, mostly in damp 
localities. 
The collection contains five or six other species of hypnum ; but the specimens are too imper¬ 
fect to admit of determination. 
HEPATICiE. 
Fegatella conica, Corda.; Nees. Hepat. Europ. IV, p. 181; Conoceplialus vulgaris, Bischojf. 
de Hepat. in Nov. Act. Acad. Nat. Cur. XVII 2, p. 1001, t. 69,/. 4. On wet rocks, and on 
the ground near springs. 
Fimbriaria tenella, Nees. Hepat. Europ. IV, p. 271 ; Bischojf. de Hepat., 1. c. t. 69,/. 11. 
On dry ground, in shady places. 
Reboulia HEMiSPHiERicA, Raadi.; Bischof. de Hepat., 1. c. t. 69,/. 1. Dry, shaded rocks. 
Duvalia tenera, Gottsclie. in G. L. and N. Synop. Hepat., p. 554 ; Marchantia tenera, Hooker 
in Kuntli. Synop. Plant., p. 45. Moist earth. 
Anthoceros lawis, Linn.; G. L. and N. Synop. Hepat., p. 586. Springy, gravelly places. 
Metzgeria furcata, Nees.; Jungermannia furcata, Linn.; Hook. Brit. Junger., t. 56. Damp, 
mossy rocks. 
Fossombronia pusilla, Nees.; Jungermannia pusilla, Hook. Brit. Junger., t. 69. Damp earth, 
frequent. 
