GRIMMIACEJS.J 7 [Orthotrichum. 



pedicel; when dry contracted, pale brown, deeply sulcate, wall with 

 8 narrow bands the length of sporangium, of 24 rows of quadrang. cells, 

 with incrassate lateral walls, stomata superficial ; teeth of per. pale 

 yellowish ; 8 bigeminate, sometimes partially cleft in the divisural line 

 or perforated at summit, papillose or with the papillae forming anasto- 

 mosing vermicular lines, when dry recurved on the outer wall of capsule, 

 cilia 8, filiform, of two series of cells. Lid conic, apiculate, yellow with 

 a red margin. Calyptra conic, not inflated, covering the caps., light 

 olive-green with the apex black, slightly hairy, rarely almost naked; 

 vaginula smooth. Male infl. lateral, bracts ovate, rather obtuse. 



HAB. Trees in damp shady places, sometimes on walls. Fr. 6 7. 

 Var. ft. rivale. Wils. 



Stems loosely tufted ; leaves succulent, lurid green, broader, very 

 obtuse, lax when dry. Calyptra narrow, lurid green : caps, exserted oblong- 

 pyriform, less tapering into the pedicel, not so contracted when dry, with 

 broader ribs of 4 5 rows of cells, cilia 8 shorter. 

 SYN. CARRINGT. in Trans. Bot. soc. Edin. 1858, p. 54, Phytol. 1858, p. 573. 



HAB. On trees by streams. 



Congleton Cloud (Wilson 1854). Laskill, Yorks. (Baker 1854). By the Wye, Cheedale 

 (Whitehead 1878) ! ! By the Kibble at Horton (Ashton and Whitehead 1878) ! ! 

 Millersdale (Holt 1884) ! ! Dailly, with O. Sprucei (Shaw 1861) ! 



Var. y. fastigiatum (Bruch) Hueben. 



Tufts smaller, denser and turgid, deep green ; leaves oblong-lanceolate, 

 shorter, with very small papillae and laxer cells ; caps, stouter, darker brown, 

 less tapering, urceolate when dry, the ribs broader, teeth and cilia shorter, 

 the latter wider, papillose ; calyptra wider, straw-coloured, ferruginous. 



SYN. Orthotrichum affine SCHVVAEG. Suppl. I, P. II, 19, t. 49. 



Orthotrichum fastigiatum BRUCH, BRIO. Bry. univ. i, 785. WALLR. Fl. cr. germ, i, 209. 

 BR. SCH. Bry. eur. fasc. 2-3, p. 18, t. b. C. MUELL. Synops. i, 698. WILS. Bry. 

 br. 180, t. 45. SCHIMP. Synops. 266, 2 ed. 322. DE NUT. Epil. 308. JURAT/. Laubm. 

 oest.-ung. 203. HOBK. Syn. 91. BERK. Handb. 223. VENTURI in Muse. gall. 171, 1.47. 



Orth. affine Var. fastigiatum HUEBEN. Muse. germ. 365. HUSN. Mouss. nord-ouest 108. 

 HAMMAR Mon. Orthot. suec. 5. 



Orth. ncglectum SCHIMP. Synops. 2 ed. 330. 

 HAB. On trees in open fields, especially in limestone districts. 



.(Baker). 



This variable species may be known by the thin pale capsule, cylindric 

 and fusiform when empty, and always with narrow ribs. The var. rivale by its 

 obtuse leaves approaches 0. rivulare, but the stomata and larger leaf-cells at 

 once distinguish it. 



