GRIMMIACE^.] 83 [Orthotrichum. 



ital. 315 (1869). BOULAY Fl. cr. de PEst, 614 (1872). HOBK. Syn. br. m. 91 (1873). 

 HUSN. Mouss. N.-ouest 109 (1873). JURATZ. Laubm. oester.-ung. 206 (1882). 

 VENTURI in HUSN. muse. gall. 182, t. 50 (1887). 



Orthotrichum umbonatum BRID. Bry. univ. i, 787. 

 Dorcadlon stramineum LINDB. Muse, scand. 28 (1879). 



Autoicous ; in small loose yellowish-green tufts, ^ f in. high. 

 Leaves imbricated when dry, or slightly flexuose, spreading when moist, 

 long, lanceolate, acuminate, acute, or rounded obtuse and concave at 

 point, or shortly apiculate, margin revolute, nerve disappearing at point 

 in the upper leaves. Cells at base smooth, rectang., elongate next the 

 nerve, passing gradually into rounded or subhexagonal, with thickened 

 walls and prominent papillae. Caps, more or less emergent, pachyder- 

 mous, orange-brown, elliptic or oblong, suddenly narrowed towards 

 base, with a short neck not defluent into pedicel, bands 8, more or less 

 distinct, orange-brown, of 2 5 rows of quadrate cells with yellow 

 thickened lateral walls, when dry the wrinkled capsule is more or less 

 contracted below the mouth ; stomata immersed, the border cells very 

 prominent and nearly covering the stoma ; annulus double, persistent. 

 Teeth 8, bigeminate, yellow, reflexed when dry, sometimes perforated 

 towards point or gaping in the median line, very finely papillose ; cilia 8, 

 subulate, of i 2 rows of cells, wider at base, sometimes 8 intermediate 

 cilia also present. Lid conic apiculate, yellow, pale red at margin. 

 Calyptra covering most of caps., campanulate, apiculate, pale yellow 

 with a brown point, slightly hairy. Vaginula very hairy. Male 

 infl. at base of fertile branch. 



HAB. On trees and rocks ; not rare. Fr. 6 7. 



Castle Howard, Welburn, Teesdale and Deepdale (Spruce 1836) ! Thirsk, Beckdale and 

 Guisbro (Baker 1851) ! Gresford, Wrexham (Wilson 1843) ! ! Matlock Bridge (Spruce 

 1844). Fountains Abbey, Cartmel and Bolton (Carrington (1856). Sussex (Mitten). 

 Ilkley, Malham and Keswick (Nowcll 1857) ' ' Killin (Moore 1859). Fairhead, Antrim 

 (Moore). Aber, N. Wales (Dr. Wood 1863). Dent, Yorks. (Barnes 1861). Dailly and 



Balquidder (Hunt 1865) ! Monsal dale and I. of Man (Holt 1884) ! ! Muckross and 



(Carrington}. Y 

 head and Glen Ogle (Horn 1887) ! ! Levens, Westmoreland (Barnes 1868) ! ! Kilton, 



Rossbeigh (Carrington}. Fairhead, Seven churches and Wicklow (Moore). Lochearn 



Saltburn and Skelton, Yorks. (R. Barnes 1887) ! ! Tyn.y-groes (Holt 1888) ! ! Tolly- 

 more Park, Down (Rev. H. Waddell 1885) ! ! 



Var. (3. patens (Bruch) Venturi. 



Bands of capsule much fainter, composed of 2 series of quadrate cells 

 with less thickened walls. 



SYN. Orthotrichum patens BRUCH in BRID. Bry. univ. i, 787. BR. SCH. Bry. eur. fasc. 2 3, 

 p. 17, t. 7. DE NOT. Syllab. 151 ; Epil. 314. C. MUELL. Synops. i, 703. HUEBEN. 

 Muse, germ, 362. HAMMAR Mon. 10. SCHIMP. Synops. 267 ; 2 ed. 324. MILDE Bry. 

 Biles. 175. JURATZ. Laubm. 204. HOBK. Syn. 2 ed. 137. 



Orth. stramineum ft. patens VENTURI in HUSN. muse. gall. 183. 

 HAB. Trees by streams. 



