GRIMMIACE^;.] 51 [Coscinodon. 



sieve. Inhabiting rocks and walls. Der. KOSKIVOV a sieve and oSovs a 

 tooth. 



A small genus of some 6 species, separated from Grimmia on account of 

 the orthotrichoid calyptra. A third European species C. Patevsoni has 

 been described by Rev. J. Fergusson in the Scottish Naturalist, iv, 62 (1877), 

 of which I have seen no specimen. 



COSCINODON CKIBROSTJS (Hedw.) Spruce. 



Dioicous ; pulvinate, dull green, canescent. Leaves ovato- 

 lanceolate, deeply silicate in each wing; nerved to apex, ending in a 

 smoothish hair. Capsule half-immersed, ovate, lid with a short beak. 

 (T. LIII, A.) 



SYN. Grimmia cribrosa HEDW. Stirp. iii, 73, t. 31, A. (1792), Sp. muse. 76 (1801). BRID. 



Muse. rec. II, P. I, 60 (1798), Sp. muse. I, 100 (1806), Mant. 36 (1819), Bry. univ. i, 



174 (1826). ROEHL. Moosg. deutsch. 120 (1800), Deutsch. fl. iii, 45 (1813), Ann. Wett. 



ges. iii, 94. LAM. DE CAN. Fl. franc. 3 ed. ii, 459 (1805). WEB. MOHR Bot. Tasch. 



132 (1807). SCHKUHR Deutsch. kr. gew. P. II, 30, t. 22 (1810). SCHWAEG. Suppl. I, 



P. I, 94 (1811). FUNCK Moost. 18, t. 12 (1821). NEES. HSCH. Bry. germ, ii, P. I, 80, 



t. 16, f. 2 (1827). HUEBEN. Muse. germ. 173 (1833). DE NOT. Syllab. 240 (1838). 



HOBK. Syn. br. m. 2 ed. 123 (1884). 

 Bryum cribrosum HOFFM. Deutsch. fl. ii, 31 (1796). 

 Coscinodon pulvinatus SPRENG. Einl. kr. gew. 372, t. 8, f. 75 (1804). FUERNR. in Flora 



1827, II, beil. p. 45. BR. SCH. Bry. eur. fasc. 23, p. 3, t. i (1837). SCHIMP. Synops. 



242 (1860), 2 ed. 287. MILDE Bry. siles. 180 (1869). HUSN. Mouss. nord-ouest 98 



(1873). JURATZ. Laubm. oester.-ung. 149 (1882). LESQ. JAMES Moss. N. Amer. 154 



(1884). 

 Coscinodon cribrosns SPRUCE Ann. Mag. N. H. 2 ser. iii, 491 (1849). C. MUELL. Synops. 



i, 765 (1849). DE NOT. Epil. bri. ital. 720 (1869). FERGUSS. in Naturalist 1880, p. 83. 



BOULAY Muse. Fr. 354 (1884). HUSN. Muse. gall. 144, t. 41 (1887). 



Dioicous ; in small dense cushions, dull or glaucous green and 

 canescent above, fuscous at base. Leaves ovato- and oblongo-lanc., 

 concave at base, thence deeply sulcate in the middle of each wing, 

 crowded, patulous, nerved to apex, the margin incurved above ; the 

 upper ending in a smoothish hair ; cells above rounded-quadrate, 

 minute incrassate opake, at base quadrate or rectangular, diaphanous, 

 not incrassate ; inner perich. bracts very thin, larger, broader. Caps, 

 just emergent, on a very short straight seta, obovate, the neck defluent 

 into the pedicel, smooth, leptodermous, pale brownish-yellow, when 

 dry, wide-mouthed, cyathiform ; ann. simple, persistent, lid cupulato- 

 conic rostellate, red ; cal. thin, ochraceous, covering f capsule ; teeth 

 orange, reflexed when dry, perforated between the articulations with 

 round or elongated ocelli. Male plant more slender, more branched. 

 Infl. in the axils of the branches, bracts broadly ovate, shortly acuminate, 

 paraphyses none. 



