TORTULACE^.] 266 [Barbula. 



Dioicous ; plants tall, slender, crowded into lax rufo-fuscous tufts. 

 Leaves when dry laxly incumbent and slightly twisted, when wet 

 suddenly falcato-recurved, subtrifarious, from an oblong base, lanceolate, 

 shorter and broader than those of B. fallax, more solid, acutely carinate, 

 with stronger longitudinal folds at base, strongly papillose on both 

 sides, nerve fuscous, of equal width, vanishing in the apex, margin erect, 

 plane above, resupinato-reflexed towards base, one wing reflexed almost 

 from the middle ; cells as in last, lowest basal rather larger, quadrate 

 and rectangular, pachydermous, upper rounded. Calyptra very narrow, 

 prolonged to of capsule, subulate; caps, erect, elongate, cylindraceous, 

 regular, rufo-fuscous ; lid with a subulate beak ; ann. none ; peristome 

 of B.fallax. Male plant more slender. 

 HAB. Among earth on limestone rocks and walls ; not common. 



Above Airlie Castle, Forfar (Drummond) ! Buxton and Middleton, Derby (Wilson) \ \ 

 Ingleboro' and Giggleswick Scar. (Baker 1855) ! ! Mucross, Killarney (Schimper and 

 Wilson 1865). Barrowfield and Whitbarrow (Barnes 1867). Litton and Malham 

 (Hunt 1867) ! ! Ben Lawers (Hunt). Hayle sands (Curnow 1871) ! ! Via Gellia, 

 Matlock (Holmes 1875). Miller's dale, Castleton and Buxton (Holt 1883) ! ! 



Var. ft. robusta Braithw. 



Stems tall, 3-5 in. high, in lax incoherent tufts ; leaves more dense, 

 broader and thicker. 



HAB. Limestone rocks at Ben Bulben, Sligo (Moore) ! ! 



The slender form of B. veflexa and the carinate strongly recurved leaves, 

 suddenly pointed and never acuminate, at once separates it from B. fallax. 

 The fruit is extremely rare, and the drawing of it is copied from Schimper's 

 figures ; Mr. Holt finds not unfrequently in the Matlock districts a slender 

 fruiting form of B. fallax growing intermixed with B. veflexa, for which it 

 may be readily mistaken. 



The Var. /3. was at first referred by Mr. Mitten to B. gigantea (Geheebia 

 catavvactavum SCHIMP.) but that species has much longer leaves with very 

 different areolation. In his Synopsis, 2 ed. Schimper records the latter from 

 Scotland, but no British specimen exists in his herbarium, and it is therefore 

 probably only an erroneous repetition of the Irish record. 



7. BARBULA SPADICEA. Mitt. 



Dioicous ; lurid green, laxly tufted. Leaves patent from the base, 

 elongate-lanceolate, nerved to the apex, margin recurved below, cells 

 incrassate and rounded from the base. Caps, cylindric, lid shortly 

 rostrate. (T. XL, A.) 



Svx.Didymodon rigidulus BRID. Muse. rec. II, P. I, 116 (1798), Sp. muse. I, 160 (1806), 

 Mant. zoo (1819), Bry. univ. i, 514 (1826). SWARTZ Muse. suec. 38 (1799). ROTH Fl. 

 germ, iii, P. I, 198 (1800). WEB. MOHR Bot. Tasch. 59 (1807). SCHKUHR Deutsch. kr. 

 gew. P. II, 68, t. 30 (1810). SCHWAEG. Suppl. I, P. I, 116 (1811). HUEBEN. Muse, 

 germ. 286 (1833). 



Bryum rigidulum DICKS. PI. crypt, fasc. iv, 12 (1801). 



