372 MUSCI. Barbula. 



20. B. flexifolia, Hampe. Distinguished from the last by the more revolute 

 leaves, squarrose-reflexed when wet, crisped when dry, the dark red capsule some- 

 what narrower and with a longer operculum, and by the longer red and more twisted 

 peristome. Linnsea, xxx. 456; Lesq. 1. c. ; Sulliv. & Lesq. 1. c., n. 132. 



On sand and boulders, near San Francisco, with the last, Bolandcr, Bauer. 



21. B. virescens, Lesq. 1. c. Intermediate between the last and B. semitorta, 

 distinguished from the one by the much looser distinct oval areolation, and from 

 B. semitorta by the longer leaves with margins revolute to the apex, and by the 

 longer and more twisted peristome upon a broader basilar membrane. Sulliv. & 

 Lesq. 1. c., n. 134. 



On rocks at Redwood and Oakland, Bolandcr. 



22. B. Beecheyi, Lesq. Ms. Stems stout, subcespitose, branching, J to 1 inch 

 high, brownish yellow : leaves loosely imbricated, open-erect, or appressed and 

 slightly tortuous when dry, ovate-lanceolate with revolute margins and strong 

 excurrent costa : capsule large, oblong, reddish, on a straight reddish pedicel a half- 

 inch long, with erect pointed operculum half as long as the capsule, and a double 

 white annulus : peristome red, twice twisted, on a short membrane. B. insulana, 

 DeNot. (?) ; Lesq. Mem. Calif. Acad. i. 11 ; Mitten, Journ. Linn. Soc. viii. 27. 



On gravelly soil, near the Big Trees (Bolandcr) ; also collected by Capt. Beechey. 



* * Leaves bright green or yellowish, twisted and incurved when dry : peristome 



very long, purple, strongly twisted. 



23. B. convoluta, Hedw. Small and slender, in broad flat mats, bright green 

 above : leaves narrowly lanceolate, acute, with flat margins above the base, and 

 costa ceasing at or below the apex ; perichsetial leaves sheathing, the inner convolute, 

 blunt, nerveless : capsule narrowly oblong, incurved, upon a long yellow pedicel, 

 with conic-subulate operculum and rather broad annulus. Muse. Frond, i. 86, t. 32 ; 

 Bruch & Schimp. 1. c., t. 154; Fl. Dan. xv, t. 2614, fig. 2. 



Oakland (Bigclow) ; in gardens at San Francisco, and on burnt logs at Ukiah, Bolandcr. Also 

 in the Alleghanies and throughout Europe. 



4. Usually someivhat taller : leaves oblong to obovate-spatulate, smooth and 

 hyaline at base, papillose and more closely areolate above: capsule usually 

 arcuate, erect on a stout pedicel : peristome upon a long basal tube, much 

 twisted. SYNTRICHIA. 



* Leaves acute or blunt, and costa slightly excurrent, crowded above : capsule 



very slender: mon&cious. 



24. B. subulata, Bridel. Stems usually short (3 lines to an inch high), loosely 

 cespitose, simple or branched, rooting at base : leaves obovate- and oblong-spatulate, 

 entire or serrate at the apex, with flat margins and sometimes a yellow border : cap- 

 sule elongated, cylindrical, brown, on a twisted pedicel, with narrowly conic oper- 

 culum, double annulus, and peristome pale red, tubular half its length or more. 

 Bruch & Schimp. 1. c., t. 160. Tortula subulata, Hedw. Spec. Muse. t. 37; Engl. 

 Bot. t. 1101. 



Big Tree Grove (Bolandcr) ; Western Arizona (Bigelow); Wahsatch Mountains ( JVatson~) ; in 

 British America from the Rocky Mountains to Canada, and through most of Europe. 



25. B. inermis, Bruch. Leaves firmer than the last, the lower oblong-lanceolate, 

 the upper long-linear, blunt or very shortly apiculate, with appressed-reflexed mar- 

 gins and no border, minutely papillose both sides, olive or yellowish : capsule more 

 narrowly cylindrical. Bruch & Schimp. 1. c., t. 161 (var. y), and t. 167. Tortula 

 inermis, Mont. ; DeXot. Muse. Ital. i. 44, t. 20. 



Base of mountains west of the Colorado River (Biyeloiv), and collected also by Bolander. 

 Southern Europe. 



