YJQ BRYACE.^. [Orthotrichum. 



leaves, the male flowers on short terminal branches, the capsule sub- 

 exserted on a short pedicel, and the teeth and cilia 8. 



28. O. diaplianum, Schrad. PLants small, soft, in irregu- 

 lar loose often scattered bright green tufts : leaves erect, oblong- 

 lanceolate, narrowed into a lanceolate serrate hyaline j^oint, 

 borders reflexed : calyi:»tra thin, naked or with a few hairs : 

 capsule immersed, thin, oblong, short-necked, pale yellow, 

 obsoletely striate and nearly smooth when dry ; teeth equi- 

 distant, linear-lanceolate, pale yellow, reflexed when dry ; cilia 

 16, filiform, of a simple row of cells. — Spicil. Fl. Germ. 69 ; 

 Bryol. Eur. t. 219. 



Hab. San Marcos, Texas (Wright). 



29. O. canuna, Mitten. Much like the last, differing in 

 the shorter fragile hyaline point of the leaves, the longer calyp- 

 tra beset with short hairs and covering nearly the whole cap- 

 sule, the capsule emergent, the teeth bigeminate, and the cilia 

 composed of a double row of cells. The author remarks 

 that in appearance it is like O.pvmilum. — Journ. Linn. Soc. 



viii. 26. 



Hab. British America [Brummond] \ San Marcos, Texas [Wright) ? 



We have not found in Drummond's mosses any specimen representing 

 this species. A note in SuUivant's herbarium states "that the parcel 

 ■with Wright's specimens has two forms, one referable by its foliage to 

 O. diaplianinn, the other appears to be 0. caman, Mitten." This obser- 

 vation is confirmed by dissection, except that the calyptra of this sup- 

 posed 0. canum is without hairs. 



**##*** Leaves obtuse. 



30. O. rivulare, Turn. Monoecious: plants long, pros- 

 trate, pendent, often floating, naked and simple below, fascicu- 

 lately ramose and densely foliate in the upper jiart, blackish : 

 lower leaves distant, ovate-lanceolate, the upper close. Ungulate, 

 obtuse, smooth and revolute on the borders ; upper areolation 

 punctiform, the lower narrowly rectangular : calyptra cam- 

 panulate, entirely naked, blackish : capsule short-pedicellate, 

 ovate, its collum shorter than the sporangium, yellow, with 

 darker striae, slightly contracted below the apex and costate its 

 whole length when dry ; cilia 8, somewhat longer, and 8 shorter 

 than the orange teeth, hyaline, curving upward. — Muse. Hib. 

 96, t. 8 ; Bryol. Eur. t. 219. 



Hab. On roots of trees and posts in water, Anderson Valley, Cali- 

 fornia, common {Bolander) ; Oregon {Hall) ; etc. 



