TORTULACE^;.] 241 [Mollia. 



Gymnostomum rupestre SCHLEICH. Cat. pi. helv. 29 (1807). SCHWAEGR. Suppl. I, P. I, 

 31, t. 10 (1811), BRID. Mant. 17, Bry. univ. i, 77. NEES HORNSCH. Bry. germ, i, 150, 

 t. 10, f. 16 (1823). HOOK. TAYL. Muse. br. 2 ed. 19, Supp. t. 2 (1827). HUEBEN. 

 Muse. germ. 49 (1833). MACK. Fl. hibern. P. 2, 10 (1836). HOOK. Br. fl. ii, 8 (1833). 

 DE NOT. Syllab. 291 (1838^, Epil. bri. ital. 603 (1869). BRUCH SCH. Bry. eur. fasc. 

 3336, p . 7. t. 56 (1846). KABENH. Deutsch kr. fl. ii, S. 3, p. 122 (1848). WILS. 

 Bry. brit. 41, t. 32 (1855). SCHIMP. Synops. 41 (1860). BERK. Handb. br. m. 294 

 (1863). HOBK Syn. br. m. 32 (1873). JURATZ. Laubm. oesterr-ung. 15 (1882). LESQ. 

 JAMES Mosses N. Amer. 53 (1884). HUSNOT Muse. gall. 9, t. 3 (1884). 



G. articulatum SCHKUHR op. c. 29, t. n. BRID. Mant. 18, Bry. univ. i, 78. NEES 

 HORNSCH. op. c. i, 156, t. 10, f. 17. 



G. stelligerum (non SMITH, nee DICKS, nee BRID.). NEES HORNSCH. op. c. 168, t. ii, f. 23. 



G. rupestre Var. stelligerum Bry. eur. Bry. brit. 



G. erythrostomum BRID. Bry. univ. i, 84. 



Weissia rupestris C. MUELL. Synops. i, 657 (1849). 



Trichostomum ceruginosum LINDB. de Tort. 229 (1864). 



Trichostomum rupestre MILDE Bry. siles. 106 (1869). 



Mollia ceruginosa LINDB. Muse. Scand. 21 (1879). 



Dioicous ; densely caespitose, ^ 3 in. high, slender, deep green 

 above, fuscescent below, tomentose, dichotomously branched, fastigiate. 

 Leaves accrescent, fasciculate, patent and curved upward, when dry 

 erect and incurved, lower narrowly lane, upper narrowly lineal-lane, 

 muticous, nerve thick yellowish, vanishing in the apex, margin plane, 

 very minutely geminato-papillose ; cells rectang. and pellucid at base, 

 quadrate and minute above. Perich. bracts sheathing, laxly hexagono- 

 reticulate at base ; caps, leptodermous, on a shortish pale red seta, oval, 

 short necked, when empty pale yellow, glossy, mouth rufous or blackish 

 red, not annulate, lid conic, shortly rostrate, the beak pale. Male plant 

 more slender, inner bracts ovate, fuscous. 

 HAB. Wet rocks, especially in calcareous subalpine districts. Not 



uncommon. Fr. 8 9. 



Var. fi. ramosissima Br. Sch. 



Compactly pulvinato-caespitose, olivaceous-green. Plants very slender, 

 very much branched, fragile ; leaves short and narrow, more obtuse ; 

 capsules small, elliptic, lid conical. 

 HAB. Castleton, Derbyshire (7*. Rogers 1881) ! ! Millers Dale (Holt 1882) ! ! 



This moss is of frequent occurrence among the limestone hills of the 

 north of England, as well as in Scotland, forming dense mats of a deep rich 

 green colour. 



Although resembling Barbula curviyostns very much in habit, the areola- 

 tion of the upper part of the leaf will at once distinguish them ; in the 

 present plant the cells are minute and opake, in B. curvirostris larger, empty 

 and clearly denned. The Var. stelligera is merely a form with repeated 

 innovations. 



13. MOLLIA VERTICILLATA (L.) Lindb. 



Dioicous; laxly tufted, dichotomously branched. Leaves from a 

 broader base with toothed margin, lanceolate, narrow and subsubulate, 



