GRIMMIACE.E.] 34 [Grimmia. 



26. GRIMMIA ATRATA Mielichh. 



Dioicous; tall, lurid green, dense-leaved. Leaves solid, lineal- 

 lane, muticous, broadly acute; cells quadrate with crenulate walls. 

 Caps, on a short thick seta, oblong-ovate, with a very short neck ; Hd 

 obtusely rostellate, calyptra cucullato-mitrffiform. (T. L, D.) 



SYN.-Gnmmw atrata Mielichh. in Flora 1819, P. I, 85. Hook. Muse. exot. ii, 9 t. 100 

 (1820). FuNCK Moost. 17, t. 12 (1821). ScHWAEG. Suppl. II, P. I, 59. '• "5 (1823). 

 Brid. Bry. univ. i, 184 (1826). Nees Hsch. Bry. germ, ii, P. I, 163, t. 23, f. ig (1827). 

 HuEBEN. Muse. germ. 180 (1833). Hook. Br. fl. ii, 27 (1833). WiLS. m Eng. Bot. 

 Suppl. t. 2771 (1833), Bry. br. 162, t. 44 (1855). Br. Sch. Bry. eur. fasc. 25-28, p. 30, 

 t. 23 (1845). AoNGST. in Fries Summ. veg. seand. 92 (1846). Rabenh. Deutseh. kr. 

 fl. ii, S. 3, 167 (1848). C. MuELL. Synops. i, 803 (1849). Hartm. Skand. fl. 7 ed. 374 

 (1858). Schimp. Synops. 224 (i860), 2 ed. 269. Zett. Rev. Grimm, seand. 100 

 (1861). Berk. Handb. br. m. 237 (1863). Hobk. Syn. br. m. 85 (1873). Juratz. 

 Laubm. oester.-ung. 175 (,1882). Boulay Muse. Fr. 365 (1884). HusN. Muse. gall. 

 131, t. 38 (1887). 



Dioicous ; tall, robust, densely pulvinato-csespitose, deep black and 

 subtomentose below, lurid green or yellowish at apex; plants erect, densely 

 and uniformly leaved, the branches elongated. Leaves solid, erecto- 

 patent, when dry curved and subcontorted, longly lineal-lane, straight, 

 carinate-concave, widely acute, muticous, margin here and there reflexed, 

 bistratose in 2 rows, nerve broad, canaliculate, vanishing at apex ; cells 

 minute, quadrate, strongly incrassate, the walls punctulato-crenulate, 

 the basal laxer, more elongated, with some pellucid at margin. Perich. 

 bracts semiamplexicaul, cymbiform-concave ; caps, on a thick yellow 

 seta, erect or suboblique, ovate-oblong with a very short neck, pachy- 

 dermous, pale ferruginous, black when old, annulus broad of 3 — 4 series 

 of cells ; lid orange, shortly and obtusely rostellate ; teeth with crowded 

 articulations, perforated at apex or cleft to njiddle, pale ferruginous, 

 recurved when dry. Male plants similar, short, infl. terminal, bracts 

 ovate. 

 Hab. — Alpine rocks, rare. Fr. ic — 11. 



Clogwyn-y-Garnedd, Snowdon (Wilson, 1826) ! ! Clogwyn-du-Arddu (Ralfs). Glen 

 Callater (Greville, 1830) ! ! Loch Kandor (Hunt). Canloehan (Ewing 1886). 



Differs from G. elongata by the absence of hyaline points to the leaves, 

 the incrassate margin and crenulate cell walls, and from G. elliptica by the 

 shorter leaves and different lid and calyptra. 



27. GRIMMIA UNICOLOR Hook. 



Dioicous; tall, fuscous. Leaves erecto-patent, from an obovate 

 base, linear-lane, obtuse, muticous, incurved at margin, basal cells 

 rectangular, pellucid at margin. Caps, ovate, lid rostrate, calyptra 

 cucullato-mitrseform. (T. L, E.) 



