GRIMMIACE^.] 43 [Grimmia. 



I have followed Prof. Lindberg in keeping this distinct, though more 

 inclined to retain it as a Var. of G. heterosticha. The leaves are longer, with 

 narrower acuminate points, acute and more or less hyaline at tip, and thus 

 it may be known from G. obtusa, but the almost obsolete hair-point seems to 

 be the chief difference from G. heterosticha, and this may be distinct as a short 

 hair, or it may be reduced to a few hyaline cells. 



34. GEIMMIA HETEROSTICHA (Hedw.} C. Muell. 



Dioicous ; in lax depressed rather rigid, dull-green hoary tufts. 

 Leaves lanceolate, gradually attenuated, piliferous ; revolute but not 

 incrassate at margin ; nerve flat, well denned. Caps, on a straight seta, 

 subcylindric, fuscous ; teeth purple, lanceolate bipartite ; calyptra rough 

 at apex. (T. LIT, A.) 



SYN. Bryum hypnoides, hirsutie canescens, vulgare DILL. Hist. muse. 368, t. 47, f. 27 

 A, B, F, G (1741), et herb. 



Trichosiomum heterostichum HEDW. MSS. TIMM Fl. megap. 215 (1788) ; Stirp. cr. ii, 70, 

 t. 25 (1789) ; Sp. muse. 139 (1801). SCHRAD. Spic. fl. germ. 64 (1794). BRID. Muse, 

 rec. II, P. I, 128, t. 2, f. 16 (1798), Sp. muse. I, 238 (1806). SWARTZ Muse. suec. 30 

 (1798), Summ. Veg. sc. 92 (1814). ROEHL. Moosg. Deutsch. 263 (1800), Deutsch. 

 fl. iii, 62 (1813). ROTH Fl. germ, iii, P. I, 192 (1800). SMITH Fl. brit. 1239 (1804), 

 Eng. Bot. t. 1347. TURN. Muse. hib. 37 (1804). SCHULTZ Fl. starg. 290 (1806). 

 WEB. MOHR Bot. Tasch. 113, t. 7, f. 5 (1807). SCHKUHR Deutsch. kr. gew. P. II, 70, 

 t. 31 (1810). SCHWAEG. Suppl. I, P. I, 149 (1811). VOIT Muse. herb. 21 (1812). 

 WAHLENB. Fl. lapp. 331 (1812), Fl. carp. 341 (1814). HOOK. TAYL. Muse. br. 61, t. 19 

 (1818). FUNCK Moost. 26, t. 17 (1821). GRAY Nat. arr. br. pi. i, 740 (1821). HOOK. 

 Fl. Scot. P. 2, 134 (1821), Br. fl. ii, 33 (1833). MACK. Fl. hib. P. 2, 19 (1836). 

 HORNEM. Fl. dan. t. 2307 f. i (1840). 



Bryum secundum GMEL. (L.) Syst. nat. 13 ed. ii, P. 2, 1333 (1791). 



Bryum heterostichum HOFFM. Deutsch. fl. ii, 40 (1796). DICKS. PI. crypt. IV, 14 (1801). 



Rhacomitrium heterostichum BRID. Mant. 79 (1819), Bry. univ. i, 214 (1826). HUEBEN. 

 Muse. germ. 207 (1833). DE NOT. Syllab. 256 (1838), Epil. bri. it. 673 (1869). BR. 

 SCH. Bry. eur. fasc. 2528, p. 9, t. 2 (1845). RABENH. Deutsch. kr. fl. ii, S. 3, 157 

 (1848). WILS. Bry. br. 168, t. 19 (1855). HARTM. Skand. fl. 7 ed. 375 (1858), 

 SCHIMP. Synops. 231 (1860), 2 ed. 277. ZETTERST. Rev. grimm. scand. 118 (1861). 

 BERK. Handb. br. m. 234, T. 21, f. 4 (1863). MILDE Bry. siles. 158 (1869). HOBK. 

 Syn. br. m. 87 (1873). HUSN. Mouss. nord-ouest 96 (1873), Muse. gall. 140, t. 40 

 (1887). LINDB. in Act. soc. sc. fenn. X, 551 (1875). JURATZ. Laubm. oester.-ung. 179 

 (1882). CHALUB. Grim. Tatr. 96, t. 14 (1882). BOULAY Muse. Fr. 359 (1884). LESQ. 

 JAMES Moss. N. Amer. 149 (1884). 



Grimmia heterosticha C. MUELL. Synops. i, 807, excl. varr. (1869). 



Dioicous ; tufts at first circular, afterwards extended and irregular, 

 blackish-brown at base, above dingy green, grey and hoary ; plants in 

 the middle of tuft erect, at margin prostrate and creeping, stiffish, 

 dichotomously branched, sparingly fasciculato-ramulose. Leaves 

 appressed when dry, when wet suddenly reflexed, then erecto-patent or 

 subsecund, from a broadly ovate base, lanceolate-acuminate, running out 

 into an elongate broad decurrent remotely denticulate hair, deeply 



