Hypnace^.J 137 [Hylocomium. 



Clavis to the species. 



Stems with numerous branched paraphyllia. 

 Stem bipinnate. 



Yellowish, glossy. Leaves ovate acuminate. proliferum. 



Dark green. Leaves triangular-coidate, coarsely serrate. umbratum. 



pinnate. 



Stem leaves suddenly contracted into a long recurved point. brevirostre. 



broadly ovate, acute. Pyrenaicum. 



Stems without paraphyllia. 



Stem pinnate, red. Leaves broad, obtuse. parietinum. 



irregularly branched. Leaves not transversely undulate. 



Leaves squarrose, divergent. 



Leaves serrulate, rough at back. iriquetrum. 



r- entire, smooth at back. squarrosum. 



— densely crowded, falcato-secund above. loreum. 



irregularly branched. Leaves undulated with transverse lines. rugosum. 



Sect. A. EUHYLOCOMIUM. Stems prolonged by arched shoots in 

 stages, bi-tri-pinnate, thickly coated with branched paraphyllia. 



I. HYLOCOMIUM UMBRATUM (Ehrh.) Br. Sch. 



Dioicous ; stems ascending, irregularly bipinnate, with branched 

 paraphyllia. Leaves laxly imbricated, cordate-acuminate, plicate, acutely 

 serrated, with two nerves. Capsule obovate, cernuous, lid conical, acute. 

 (T. CX, A.) 



Syn. — Hypnum umbratum Ehrh. PI. crypt, exs. No. 66 (1788). Hoffm. Deutsch, fl. ii, 60 

 (1793). Hedw. Sp. muse. 263, t. 67, f. 10 — 13 (1801). Brid. Muse. rec. II, P. II, 76 

 (1801), Sp. muse. II, 136 (1812), Mant. 163 (1819), Bry. univ. ii, 433 {1827). Roth 

 Tent. fl. Germ, iii, p. i, 278 (1800). Web. Mohr Bot. Tasch. 338 (1807). VoiT Muse. 

 Herbip. 95 (1812). Roebl. Deutsch. fl. iii, 102 (1813). Schwaeg. Suppl. I, P. II, 234 

 (1816). FuNCK Moost. 59, t. 41 (1821). HUEBEN. Muse. germ. 657 (1833). De Not. 

 Syllab. 17 (1838). Rabenh. D. kr. fl. II, S. 3, 280 (1848). C. Muell. Synops. 457 

 (185!^. WiLS. Bry. Biit. 382, t. 57 (1855). Berk. Handb. ni (1863). Hobk. Synops. 

 181 (1873). BouLAY Muse. Fr. 8 (1884). 



Hypnum proliferum R, umbratum Wahlenb. FI. Lapp. 373 (1812). 



Hylocomium umbratum Br. Sch. Bry. Eur. fasc. 49 — 51, p. 6, t. 2 (1852). Schimp. Synops. 

 653 (i860), 2 ed. 799. MiLDE Bry. Siles. 377 (i86g). De Not. Epilogo 95 {1869). 

 Hobk. Synops. 2 ed. 233 (18S4). Lesq. James Moss. N. Amer. 407 (1884). Husn. 

 Muse. Gal. 423, 1. 122 (1894). Dix James. Stud. Handb. 49). (1896). Limpr. in Rabenh. 

 D. kr. fl. Laubm. iii, 581 (igoi). 



Dioicous ; growing in lax dark green irregular tufts. Stem sul> 

 erect, slender, bipinnate, with branched paraphyllia ; branches arched 

 downward, acute, fasciculate. Stem leaves spreading, bright or yellowish- 

 green, from a decurrent base, cordate-acuminate, irregularly plicato- 

 striate, sharply serrate, with two nerves reaching middle ; cells orange 

 and longish oval at base ; branch-leaves ovate, short-pointed, the margin 

 recurved. Perich. bracts elongate-lanceolate, recurved and serrulate at 

 apex ; seta purple, capsule short, horizontal, castaneous, cernuous, 

 obovate, lid conic acute peristome orange, cilia 3—4. 



