DICRANACE.E.] 165 [Oncophorus. 



which we are able to form several minor groups, one of which, Rhabdoweissia, 

 deviates the most in its dwarf habit and small regular striated capsule. 

 Besides the British species, 0. civmtus (BniD.) alpestre (WAHLENB.}brevipes 

 LINDB. Martii (HORNSCH.) and schisti (WAHLENB.) are also found in Europe. 



CLAVIS TO THE SPECIES. 



Capsule strumose. 



Capsule smooth ; leaves smooth. 



Leaves lanceolate. vlrens. 



Leaves from a dilated base, suddenly subulate. Wahlcnbcrgii. 



Capsule furrowed ; leaves papillose. strumifer. 



Capsule not strumose. 



Capsule asymmetric, oblique. 



Leaves lanceolate, rather obtuse ; perich. bracts short. gracilesccns. 



Leaves lane. -subulate, acute ; perich. bracts longly subulate, polycarpus. 

 Capsule symmetric, erect. 



Capsule smooth. Bruntoni. 



Capsule furrowed. 



Leaves obtuse ; teeth of per. long, lanceolate. crispatus. 



Leaves acute ; teeth of per. short, subulate. striatus. 



Sect. i. LEIOCYSTIS Lindb. Plants robust ; leaves smooth. Cap- 

 sule smooth, cernuous, incurved, teeth of peristome stout, trabeculate, cleft 

 into two legs. 



i. ONCOPHORUS VIRENS (Sw.) End. 



Autoicous ; in large lax tufts. Leaves lanceolate cuspidate, flexuose, 

 nerved to apex, entire or serrate at point. Capsule ovate, subcylindric, 

 incurved with a short strumose neck, smooth ; peristome dicranoid. 

 (T. XXV, B.) 



SYN. Bryum virens SWARTZ in Act. Upsal. 1784, p. 241. 



Dicranum virens HEDW. Muse. fr. iii, 77, t. 32 (1792), Sp. muse. 142 (1801). ROTH Fl. 

 germ, iii, P. I, 173 (1800). BRID. Muse. rec. II, P. 1, 178 (1798), Sp. muse. 1, 193 (1806), 

 Mant. 54 excl. syn. WAHL. (1819). SWARTZ Muse. suec. 33 (1799). ROEHL. Moosg. 

 deutsch. 379 (1800), Deutsch. fl. iii, 73 (1813). SMITH Fl. brit. iii, 1406 (1804), Eng- 

 Bot. t. 1462. TURN. Fl. hib. 69 (1804). P. BEAUV. Prodr. 55 (1805). WEB. MOHR Bot. 

 Taseh. 182 (1807). SCHWAEG. Suppl. I, P. I, 194 (1811). HOOK. TAYL. Muse. brit. 54, 

 t. 17 (1818). GRAY Nat. arr. br. pi. i, 735 (1821). HOOK. Fl. scot. P. 2, 132 (1821). 

 Br. Fl. ii, 38 (1833). FUNCK Moost. 31, t. 22 (1821). SCHULTZ in Syllog. Ratisb. 

 1828, p. 149. HUEBEN. Muse. germ. 231 (1833). DE N OT. Syll. 211 (1838), Epil. bri. 

 ital. 625 (1869). Hartm. Skand. fl. FIOR. MAZZ. Bry. Rom. 2 ed. p. 17 (1841), 

 BR. SCHIMP. Bry. eur. fasc. 37-40, p. 15, t. 3 (1847). RABEN. Deutsch. kr. fl. ii, S. 3, 

 137(1848). WILS. Bry. br. 66, t. 17 (1855). HOBK. Syn. br. m. 40 (1873). 



Oncophorus virens BRID. Bry. univ. i, 399 (1826). LINDB. Muse, scand. 27 (1879). 



Angstroemia virens C. MUELL. Synops ii, 609 (1851). 



Cynodontium virens SCHIMP. Bry. eur. Coroll. 12 (1855), Synops. 63 (1860), 2 ed. 64 (1876). 

 BERK. Handb. br. m. 285 (1863). JURATZ Laubm. oesterr-ung. 27 (1882). 



Autoicous ; in dense laxly cohering tufts, yellow green above, 

 fuscous or black below ; stem ascending 2 3 in. high, repeatedly 

 dichotomous, fastigiate, slightly radiculose. Leaves erecto-patent 

 flexuose, more or less crisped when dry, from an oblong semivaginant 

 base, lanceolate cuspidate acute, subcomplicate-carinate, smooth, 

 margin recurved, entire or serrate at apex, nerve subterete, vanishing 

 at apex or very slightly excurrent, basal cells narrow pellucid, upper 



