TORTULACE^E.j 240 [Mollid. 



SYN. Gymnostomum calcareum NEES HORNSCH. Bry. germ, i, 153, t. 10, f. 15 (1823). BRID. 

 bry. univ. i, 65 (1826). HUEBEN. Muse. germ. 48 (1833). DE NOT. Syllab. 291 (1838), 

 Epil. bri. ital. 603 (1869). BRUCH SCH. Bry. eur. fasc. 33 36, p. 6, t. 3 4 (1846). 

 RABENH. Deutsch. kr. fl. ii, S. 3, 121 (1848). SCHIMP. Synops. 39 (1860), 2 ed. 40 

 HUSN. Mouss. nord-ouest 40 (1873), Muse. gall. 8, t. 3 (1884). JURATZ. Laubm. 

 oesterr.-ung. 14 (1882). LESQ. JAMES Mosses N. Amer. 53 (1884). 

 Weissia calcarea C. MUELL. Synops. i, 659 (1849). 

 Hymenostylium calcareum MITT. Journ Linn. soc. i, Suppl. 33 (1859). 

 Trichostomum calcareum LINDB. de Tort. 229 (1864). MILDE Bry. siles. 107 (1869). 

 Mollla calcarea LINDB. 



Dioicous ; short, very tender and slender, in densely compacted 

 tufts, bright light green above, ferruginous below. Lower leaves very 

 small, erecto-patent, narrowly lane, upper much larger, lineal-lane, 

 rather obtuse, concave, margin very minutely crenulate, nerve stout, 

 prominent at back, vanishing towards apex, cells minute quadrate. 

 Perich bracts from a broader subvaginant laxly areolate base, lanceolate- 

 subulate, patulous ; caps, on a pale straw-coloured seta, erect, oblong, 

 short-necked, pale brown with a red mouth, when empty, subcylindric 

 truncate, slightly contracted below the mouth ; annulus very narrow, 

 persistent, lid conic with an acute oblique beak. Male plant more 

 slender, infl. very minute, lateral, bracts ovato-acuminate. 

 HAB. Calcareous rocks ; very rare. Fr. 6 7. 



Cheedale, Derbyshire (Holmes 1874) ! ! Monsal Dale, Ashwood Dale and Ravensdale 

 c. ir. (Holt 1883) ! ! 



Var. /?. viridulum (Brid.) 



Plants very short and slender, darker green, branched; lower leaves 

 minute, remote, upper crowded, oblongo-lanc. shorter, recurved from the 

 middle, subacute or muticous ; caps, minute, ovate. 

 SYN. Gymnostomum viridulum BRID. op. c. 66. 



G. calcareum Var. y. viridulum Bry. eur. 1. c. t. 3. 



G. calcareum Var. S. brevifolium SCHIMP. Synops. 40. 

 HAB. Damp rocks. Blackball, Banchory (J. Sim 1871) ! ! 



This moss is most striking by its lovely light green mats, and it is 

 extraordinary that it should so long have escaped notice. Mr. Holt has had 

 the good fortune to find it in fruit, which is only produced sparingly and in 

 crevices away from the light. The plant is very variable in the fruit, the 

 capsule being sometimes nearly globose, and in other cases subcylindric ; the 

 density of the stems is also in some cases so great as to attain an almost 

 corky consistence. 



12. MOLLIA JERTJGINOSA (Sm.) Lindb. 



Dioicous; densely tufted, dichotomously branched. Leaves lanceo- 

 late-linear, rather obtuse, crenulate with papillae at base, nerve 

 vanishing. Caps, oval, riot annulate, lid rostrate. (T. XXXV, B.) 



SYN. Gymnostomum ceruginosum SMITH Fl. brit. iii, 1163 (1804), Eng. Bot. t. 2200. BRID. Sp. 

 muse. I, 36 (1806), Mant. 18 (1819), Bry. univ. i, 80(1826). SCHKUHR Deutsch. kr. 

 gew. ii, P. II, 25, t. ii (1810). 



