Grimmiacejj.] 69 [Orthotrichum. 



in Phytol. 1858, p. 573. Schimp. Synops. 270 (i85o), 2 ed. 316. Berk. Handb. br. 

 m. 223 (1863). MiLDE Bry. siles. 175 (i86g). Boulay FI. cr. de I'Est 607 (1872). 

 HoBK. Syn. br. m. 92 (1873). HusN. Mo.iss. nord-ouest io5 (1873). Juratz. Laubm. 

 osster.-ung. 200 (18S2). Lesq. James Moss. N. Amar. 167 (1884). Vent, in Muse, 

 gall. 15s, t. 44 (1887). 



Orthotrichum affine p. riipestre Brid. Sp. muse. II, 7 (1812). 



Orth.flaccum De Not, Epil. 301. 



Dorcadion rupestre Lindb. muse, scand. 29 (1879). 



Autoicous; more oi^ less densely tufted or pulvinate, .fuscescent, 

 olivaceous or yellowish-brown, rather rigid when dry ; stems erect, 

 I — 2 in. high, sometimes longer and ascending, more or less branched. 

 Leavesoblong-lanc.,suddenly or gradually acuminate, straight, imbricated 

 when dry, recurvo-patent when moist, carinate, the margin recurved or 

 revolute to apex, nerve vanishing toward point, or reaching it ; cells 

 mostly unistratose, narrowly rectangular at base, rounded or angular 

 above, papillae minute, simple or bifurcate. Caps, immersed or emer- 

 gent, pale yellow, fuscous when old, oval or oblong, truncate when dry 

 and empty, not contracted below mouth, gradually defluent at base into 

 the pedicel ; bands 8, rarely with intermediate ones, stomata superficial, 

 annulus persistent, of 3 — 3 rows of depressed cells ; lid conic, apiculate ; 

 calyptra plicate, campanulate, ferruginous, with numerous yellow hairs. 

 Teeth 8, splitting into 16, each half lacunose or cleft, pale yellow, erect 

 when dry, surface papillose or with faint sinuous lines, cilia 8, yellowish, 

 long as teeth, sometimes wanting. Vaginula naked or hairy, male infl. 

 lateral, bracts ovate, rather obtuse. 



Hab. — Rocks and walls in subalpine districts. Fr. 7 — 8. 



Var. jS. rupincola {Funck.) Htiehen. 



Densely crowded, subpulvinate ; leaves straighter, capsule smaller, 

 emergent, calyptra less hairy. 



Syn. — Orthotrichum rupincola Funck Moostasch. 35, t. 23. Brid. Bry. univ. i, 284. Grev. 

 Seott. Cr. fl. ii, t. 105 ; Fl. edin. 249. Hook. Grev. in Edin. J. Sc. i, 122. Hook. Tayl. 

 Muse. br. 2 ed. 127, suppl. t. 4. Hook. Br. fl. ii, 54. 

 Orthotrichum rupestre Var. /3, rupincola Hueb. Muse! germ. 369. WiLS. Bry. brit. 

 Schimp. Synops. Milde, Juratzka, &c. 



Hab. — On drier rocks in the Highlands. 



This is rather the compact form of the species, just as 0. Sehlmeyeri 

 Bruch, is a tall lax form. 



Var. 7. Sturmii (Hornsch.) jfumtz. 



Plants darker and more slender, the leaves shorter and rougher, with the 

 cells in the upper half mostly bistratose, some cells here and there occasionally 

 forming a third series. Caps, less defluent at base and passing suddenly 

 into a shorter pedicel, less distinctly striate, ciHa almost obsolete or 

 abortive. 



