1858.] THE ORTHOTRICHEiE OF YORKSHIRE, 571 



care must be taken not to confound it witli tlie * hairs' of 0. 

 stramineum, the capsule of which becomes narrow and contracted 

 when empty. 



4. 0. stramineum, Hornsch. Leaves lanceolate, lax when dry ; 

 capsule exserted, obovate, orange-brown; cilia 8 or 16, rough ; 

 vaginula hairy ; calyptra campanulate, with purple apex. June, 

 July. Teesdale, Mr. Spruce ; Thirsk, Deepdale, Ayton, Cleve- 

 land, Guisborougli, Studley, Malham, Wharfdale. 



A fine species, often growing with 0. affine, but with smaller 

 tufts, and more acute, rigid leaves ; capsule short, pyriform, 

 orange-brown, with dark broad strise. Outer teeth buff- coloured; 

 cilia often 16, with traces of trabeculse. Calyptra broad, convex, 

 straw-coloured, the apex purple, slightly hairy. Best distinguished 

 by the hairy vaginula. 



5. O. pumilum, Dickson. Tufts minute; leaves ovate-lanceo- 

 late, imbricated when dry ; capsule elliptic, nearly sessile, rounded 

 below; cilia 8, short. Calyptra campanulate, naked, brown 

 above. Yery rare. April, May. Copgrove, Rev. J. Dalton ; 

 near Ripon, York, Cleveland. 



/?. Leaves more or less obtuse. 



6. 0. pallens, Bruch. Leaves pale-green, ligulate-lanceolate, 

 obtuse, imbricated when dry ; capsule immersed, elliptic-oblong ; 

 cilia usually 16 ; calyptra campanulate, naked, pale. May, June. 

 Near York, Mr. Spruce ; Mickley, Mr. Baker ; between Bolton 

 and Ilkley. 



Forming small pale tufts. Upper leaves longer, almost ligulate, 

 carinate ; the nerve strong, reaching to the apex. Areolae in this 

 species, and 0. tenellum, larger than in 0. affine, but smaller than 

 in 0. pumilum, bearing minute papillae. Capsule straw-coloured, 

 with broad ribs, contracted below the mouth when old, pass- 

 ing abruptly into the short pedicel. • Cilia slender, incurved, the 

 intermediate ones shorter. 



The Wharfdale specimens collected in various places are re- 

 markable for having only 8 cilia, the capsule shorter, and deeper 

 coloured than usual, approaching O. pumilum, — while the narrow 

 obtuse leaves and pale calyptra agree in all respects with 0. 

 pallens. Extreme forms of the two appear sufficiently distinct, 

 but if, as Schimper asserts, 0. pumilum varies with obtuse leaves, 

 and the form of the capsule and number of cilia in 0. pallens are 



