Barbula. MUSCI. 369 



2. Low perennials, with rather broad soft leaves : tubular base of the 

 peristome short (except in n. 11). BARBULA. 



* Leaves thin and smooth, broadly ovate- or oblong-lanceolate, the costa pro- 

 duced into a hair-like awn, and bearing toward the apex of the leaf a dense 

 cluster of green filaments. 



2. B. membranifolia, Schultz. Stems in dense hoary mats, \ to 1 inch 

 high, simple or branched : leaves erect-spreading, broadly ovate, strongly concave, 

 the apex white-membranous and dentate, tipped by a very long hair : flowers 

 monoecious, the male near the female, with 1 or 2 perigonial leaves : capsule erect 

 upon a red pedicel, ovate-elliptic or narrowed and slightly incurved, brown or black- 

 ish, half-covered by the whitish calyptra ; operculum. narrow ; annulus simple : 

 teeth thrice twisted. Bruch & Schimp. 1. c., t, 140. Tortula membranifolia, 

 Hook. Muse. Exot. i, t. 26. 



Western Arizona, on Williams River, near the mouth of Santa Maria Creek (Bigelow), and 

 reported by Schimper as from California ; through Southern Europe and in the Caucasus. 



3. B. chloronotos, Bruch. Smaller than the last, with smaller and narrower 

 leaves, not white-membranous, and tipped with a shorter awn : flowers dioecious, 

 the male flowers terminal and perigonial leaves many : capsule smaller, with com- 

 pound annulus, and shorter twice twisted peristome. Bryol. Eur. t. 141. I'ortida 

 crassinervia, DeNot. Muse. Ital. i. 23, t. 6. 



Collected with the last by Bigelow ; also European. 



* * Leaves oblong or ovate-oblong, papillose, mucronate, twisted or contorted 



when dry. 

 H Divisions of the teeth unequal, becoming slightly twisted when damp. 



4. B. atrovirens, Schimp. Bather loosely matted, dull green, about 3 lines 

 high : leaves crowded, spreading, ovate-oblong, shortly acuminate, concave, the 

 margin narrowly revolute, the strong nerve thickened above and slightly excurrent 

 or ceasing below the apex : male flowers bud-like at the base of the fertile branch : 

 capsule oblong-elliptic, brown upon a yellowish pedicel ; operculum obliquely 

 beaked; annulus simple. Syn. "Muse. Eur. 2 ed. 194. Grimmia atrovirens, 

 Engl. Bot. t. 2015. Desmatodon nervosus, Bruch. & Schimp. 1. c., t. 132; Wilson, 

 1. c., t. 20. D. nervosus, var. edentulus, Sulliv. & Lesq. Muse. Am.-Bor. Exsicc. 

 2 ed. n. 121. D. Calif ornicus, Lesq. Mem. Calif. Acad. i. 10. 



On 1he ground and old adobe walls near San Francisco (Bolandcr) ; Guadalupe Island (Palmer) : 

 throughout Europe, and ranging to the Cape of Good Hope. 



5. B. G-uepini, Schimp. 1. c. 197. Lower leaves ovate-lanceolate, the upper 

 ovate-oblong, strongly papillose, with reflexed margins, and awned by the excurrent 

 costa : male flowers lateral, with 2 or 3 perigonial leaves : capsule oblong and 

 subcylindric, brown, with a tall conical shortly beaked yellow operculum ; annulus 

 narrow. Desmatodon Guejnni, Bruch & Schimp. 1. c., t. 133. 



On the ground near Oakland, Bolnnder. Otherwise known only from France. 



-i < Teeth of the peristome long and closely twisted. 

 -- Inflorescence monoecious. 



6. B. cuneifolia, Bridel. Stems densely clustered, 2 or 3 lines high, simple : 

 lower leaves remote, broadly ovate, acuminate, the upper spreading-rosulate, oblong- 

 ovate or spatulate, shortly acuminate, margin flat, the thin nerve ceasing below the 

 apex or excurrent, all flaccid, loosely areolate and almost pellucid, crisped when 

 dry : capsule elliptic-oblong, straight or nearly so ; operculum narrowly conic, 

 straight ; annulus simple, narrow : peristome pale, upon a rather broad base. 

 Bruch & Schimp. 1. c., t. 156. Tortida cuneifolia, Smith, Eng. Bot. t. 1510. 



On clay soil near Oakland (Bolander) ; Western Europe. Variable in the form of its leaves. 



