362 MUSCI. Pottia. 



F. KTBIOIVOSA (Barbulv n.ib'.ginosn, Mitten, Journ. Linn. Soc. viii. 27), collected by Douglas, 

 may be found in Northern California. It is a dicecious species, with spreading leaves, curved and 

 appressed when dry, the lower ovate, the upper subulate-lanceolate from an ovate decurrent base, 

 acute with the costa reaching the thickish apex, margin recurved, areolation minute, rounded, 

 minutely papillose ; pericluetial leaves larger, erect, convolute, subulate-apiculate with excurrent 

 costa : capsule oval-cylindric, upon a red pedicel ; operculum conic, half as long as the capsule ; 

 annulus of a triple row of cells. 



* * Peristome distinct. ANACALTPTA. 



6. P. Starkeana, Muell. Closely resembling P. minutula, from which it is 

 distinguished by broader and comparatively shorter leaves, more shortly cuspidate 

 and with narrower and less distinct areolation, the oval capsule with a narrow per- 

 sistent annulus, and the pale or yellowish peristome of 1 6 obtuse or truncate 3-4- 

 jointed entire or cribrose teeth. Syn. i. 547. Weissia Starkeana, Hedw. 1. c. 

 iii. 83, t. 34. Anacalypta Starkeana, Nees & Hornsch. ; Bruch & Schimp. Bryol. 

 Eur. t. 125 ; Wilson, 1. c., t. 14; Sulliv. & Lesq. 1. c., n. 119. 

 Mission Dolores, on clayey ground (Bolandcr); also European. 



8. WEISSIA, Hedw. 



Low cespitose perennials, dichotomously or fastigiately branched, on the ground 

 or on rocks. Leaves in 8 ranks, linear-lanceolate to oblong-subulate, costate ; areo- 

 lation minute, quadrate, at base rectangular and hyaline. Inflorescence monoecious, 

 terminal, bud-like. Calyptra cucullate, long-beaked. Capsule erect upon a rather 

 long pedicel, oval or oblong, with rostrate operculum, and peristome of 16 flat 

 lanceolate or truncate teeth, entire or bifid at the apex, transversely jointed and often 

 perforated. 



A genus variously limited, represented by a single species in the Atlantic States, by 8 or 9 in 

 Europe, and most abundantly in South America. 



* Perichcetial leaves not sheathing : teeth of peristome somewhat irregular. 



1. W. viridula, Bridel. Stems about half an inch high, nearly simple or 

 fastigiately branched, in bright green more or less crowded tufts : leaves linear- 

 lanceolate, flexuous-spreading, with very involute margins, crisped when dry, the 

 costa slightly excurrent : capsule ovate to oblong, brown or reddish ; teeth very 

 variable, often rudimentary, reddish, 2-5-jointed. Bruch & Schimp. Bryol. Eur. 

 t. 21 ; Sulliv. in Gray's Man. 2 ed. 618, t. 1. W. controversa, Hedw.; Wilson, 

 Bryol. Brit. t. 15. 



Var. Capsule longer, ovate-cylindrical, regularly striate or plicate, green. Lesq. 

 in Mem. Calif. Acad. i. 6. 



On the ground at and around San Francisco, both forms, Bolander. A common and very 

 variable species, in the Atlantic States and throughout Europe, on roadsides and in fields and 

 meadows. 



* * Perichcetium distinct, sheathing : teeth more perfect, lanceolate. (Dicrano- 



weissia, Lindb.) 



2. TV. cirrhata, Hedw. Tufted, soft, the taller steins much branched, bright 

 green above, pale ferruginous below : leaves spreading, linear-lanceolate from an 

 oblong-ovate base, crisped when dry, the margins reflexed and costa rarely slightly 

 excurrent; perichsetial leaves broader and shorter, somewhat sheathing nearly to 

 the apex : capsule long-oblong, subcylindrical, pale brown with a small reddish 

 orifice, and a persistent annulus of 3 rows of cells : teeth narrowly linear-lanceolate, 

 entire, erect when dry, reddish purple, paler above. Spec. 69, t. 12; Bruch & 

 Schimp. 1. c., t. 25 ; Wilson, 1. c., t. 15. Dicranoweissia cirrhata, Schimp. 



Common in the redwoods and at the Big Tree groves, especially on burnt and decayed wood 

 (Bigelow, Bol.andcr) ; Washington Territory and Oregon, Douglas, Lyall. Also European. 



