Grimmiace^.] 49 [Grimmia. 



Tnchostomum canescens Timm F1. meg. prodr. 215 (1788). Hedw. St. crypt, iii, 5, t. 3 

 (lygi), Sp. muse, iii (1801). Brid. Muse. rec. II, P. I, 123 (1798), Sp. muse. I, 235 

 (1806). SwARTz Muse, siiee.30 (1798), Summ. Veg. Scand. 39 (1814). Roth Tent. fl. 

 germ, iii, P. 1, 192 (1800). Roehl. Moosg. deutsch. 266 (1800), Deutsch. fl. iii, 63 (1813)". 

 Smith Fl. brit. 1242 (1804), Eng. Bot. t. 2534. Turn. Muse. hib. 39 (1804). P. Beauv.' 

 Prodr. go (1805). Schultz Fl.starg. 290 (1806). Wee. Mohr Bot. Tasch. 116 (1807)'. 

 Schkuhr Deutseh. kr. gew. P. II, 72, t. 32 (1810). Schwaeg. Suppl. I, P. I^ xja 

 t. 38 (1811). VoiT Muse. herb. 22 (1812). Wahlenb. Fl. lapp. 577 (1812). Mart'. 

 Fl. cr. erl. 93 (1817). Hook. Tayl. Muse. br. 61, t. 19 (1818). Hook. FI. scot. P. Iii 

 134 {1821), Br. fl. ii, 33 (1833). FuNCK Moost. 26, t. 17 (1821). Gray Nat. arr. br. pi. i' 

 739 (1821). 



Gymnostomum caitcsccns Schrank Bayers, fl. ii, 436 (1789), Prim. fl. salisb. 221 (1792). 



Bryum canescens Hoffm. Deutseh. fl. ii, 41 (1796). 



Rhacomitrium canescens Brid. Mant..78 (1819), Bry. univ. i, 208 (1826). Hueben. Muse, 

 germ. 206 (1833). De Not. Syllab. 255 (1838), Epil. bri. ital. 671 (i86g). Hartm.' 

 Skand. fl. 4 ed. 389 (1843). Br. S'ch. Bry. eur. fase. 25 — 28, p. 12, t. 78 (1845). Aongstr. 

 in F'ries Summ. veg. scand. 92 (1846). Rabenh. Deutseh. kr. fl. ii, S. 3, 159 (1848). 

 LiEEM. FI. dan. t. 2561 (1852). WiLS. Bry. br. 170, t. ig (1855). Schimp. Synops. 

 235 (i860), 2 ed. 2S0. Zetterst. Rev. Grimm, scand. 128 (1861). Berk. Handb. br. 

 m. 233 (1863). MiLDE Bry. siles. 159 (1869). Hobk. Syn. br. m. 88 (1873). Husn! 

 Mouss. nord-ouest 97 (1873), Muse. gall. 141, t. 40 (1887). Juratz. Laubm. oester.-ung. 

 183 (1882). Chalub. Grimm. Tatr. 112, t. 17 (1882). Boulay Muse. Fr. 357 (1884). 

 Lesq. James Moss. N. Amer. 151 (1884). 



Grimmia canescens C. Muell. Synops. i, 807 (1849). 



Rhacomitrium ericoides Var. /?. canescens Lindb. in Oefv. v. ak. foerh. xxiii, 553 (1866), 

 Act. soc. sc. fenn. X, 547 (1875). 



Grimmia ericoides var. p. canescens Lindb. Muse, scand. 2g (1879). 



Dioicous ; laxly csespitose, tlie tufts large, plane, yellowish to dingy 

 green, hoary at top, fuscous at base. Stems erect or spreading, 2 — 4 in. 

 long, with few or many short obtuse branches. Leaves patulous, curved 

 backward and forward, the terminal often secund, from an oblong 

 decurrent concave subsulcate base, narrowly lanceolate, carinate, 

 extended into a flat lanceolate subulate, toothed papillose hair, margin 

 revolute, not incrassate, all surface of lamina densely papillose, nerve 

 very thin, sulcate, vanishing below the hair; cells at base elongated, 

 eroso-sinuose, with several rows at margin quadrate and hyaline, at 

 apex rectangular, sinuose. Perich. bracts sheathing beyond middle, 

 with a papillose nerve. Caps, on a long purple seta compressed when 

 dry and twisted to the left, ovato-elliptic, small mouthed, angular when 

 dry, coriaceous, brown ; cal. longly subulate, rough at apex ; lid subulate, 

 as long or longer than caps., straight or oblique, annulus broad ; teeth 

 long as caps., on a more produced basal membrane, purple, filiform, 

 cleft to base, papillose. Male plant more slender, sparingly branched ; 

 inner bracts oblong with a hyaline point. 



Hab. — Sandy stony heaths and walls. Fr. 3. 



Var. fi. ericoides (Schrad.) C- Muell. 



Plants shorter, yellowish-grey, lateral ramuli very numerous, nearly 

 equal, pinnately arranged. Leaves shorter squarrose, with shorter hair- 

 points. 



