Grimmiace^.] 42 [Grimmia. 



or obsolete hair-point. Caps, elliptic-oblong, narrow at mouth; lid 

 conico -rostrate ; teeth short, pale, cleft to base. (T. LI, D.) 



SYH.—Triclwstomum affine Schleich. PI. crypt, helv. 3 cent. n. 18 (1805), Cat. pi. helv. 2 ed. 

 31 {1807). Web. Mohr Bot. Tasch. 127 in obs. (1807). 



Trichostomum alopecitrum Schkuhr Deutsch. kr. gew. 77, t. 35 (i8io). 



Trichostomum heterostichim ScnwA^GR. Suppl. I, P. I, 149 P-P- (1811). De Can. F1. 

 franc. V, 217 p.p. (1815). W.-Arn. in Mem. soc. d'hist. nat. Pans 11, 270 p.p. (1825). 



Rhacomitrium alopecurum Beid. Mant. 79 (i8ig), Bry. un. i, 215 (1826). 



Trichostomum fastigiatum Wallr. F1. cr. germ, i, 175 (1831) ? 



Rhacomitrium heterostichtwi Var. )3. alopecurum Hueen. Muse. germ. 208 (1833). Br. 



ScH. Bry. eur. fasc. 25—28, p. g (1845). Rabenh. Deutsch. kr. fl. ii, S. 3, 157 (1848). 



WiLS.Bry.br. 168 (1855). Schimp. Synops. 231 (i860), 2 ed. 277. Juratz. Laubm. 



oester..ung. 180 (1882). 



Trichostomum fasciculare Var. Tayl. in Mack. Fl. bib. 2, p. 20 in obs. (1836). 



Trichostomum saxatile Tayl. in Trans, bot. soc. Ed. ii, P. i, i (1845). 



Grimmia heterosticha Var. p. alopecura C. Muell. Synops. i, 808 (1849). 



Rhacomitrium affine Lindb. Act. soc. sc. fenn. X, 552 (1875). 



Grimmia affinis Lindb. Muse, scand. 29 (1879). 



Grimmia sublurida Stirton in Scott. Nat. ix, 36 (1887). A dwarf starved form. 



Dioicous ; slender, elongated, ascending or trailing, fusco-lutescent, 

 with many fasciculate branches, scarcely incano-pilose. Leaves never 

 secund, accrescent, lanceolate-acuminate, very narrow at apex, much 

 more narrowly revolute at the bistratose margin, but flat at the short 

 narrow hair ; nerve well-defined, rather thick, very prominent at back, 

 lost in the hair ; leaf-cells rectangular, narrow and elongated at base, 

 roundish-quadrate and crenulate above, externally at the connate 

 longitudinal walls minutely crested. Caps, shorter, elliptic- oblong, 

 narrower at mouth, very pachydermous, formed of longer incrassate 

 cells ; peristome short, paler, teeth more or less connate at base. 



Hab. — Rocks and walls in subalpine places. Fr. 3. 



Frequent in the Snowdon district and Ireland. 



Var. ^. gracilescens {B. S.) Lindb. 



Stems more slender, elongated, with few branches or almost simple. 

 Leaves with very short hair points ; caps, small, on a shorter seta. 



Syn. — Rhacomitrium heterostichum y. gracilescens Br. Sch. p.p. WiLS. Bry. br. p.p. Schimp. 

 Synops. p.p. 



Grimmia heterosticha y. gracilescens C. MuELL. Synops. i, 808, p.p. 



Hab. — Damp shady rocks. 



Killarney (Wilson) I 1 Shanslieve {Rev. Mr. Lett 1884) ! ! High Force, Teesdale (Baker 

 1856) ! 



