Platygyriiim.] BRYACE^. 307 



moistened, half-clasiDing and decurrent at the auriculate base, 

 broadly ovate, acute, replicate on the margin to above the mid- 

 dle, reflexed to the point, carinate by the stout pale subjjercur- 

 rent costa ; alar cells oblong, the upper ovate-quadrate, papillose 

 on both faces ; auricles denticulate-spinose : fruit unknown. — 

 Mem. Calif. Acad. i. 30. 



Hab. Monte Diablo, California (Bolander). 



The base of the leaves is rounded into a large ciliate auricle, as in ^. 

 apiculatus, and the margins above are also minutely denticulate by the 

 protrusion of the papillate cells, but this is the only point of affinity be- 

 tween the species, the leaves being broadly ovate-acute, carinate, and im- 

 bricate all around when dry. 



Tribe XXII. ORTHOTHECIE^. 



Plants generally large, widely spreading and cespitose, creep- 

 ing and ramulose; branches erect or complanate. Leaves 

 smooth, sometimes sulcate, costate or ecostate or bicostate at 

 base ; areolation narrowly rhomboidal or linear, large and quad- 

 rate at the basal angles. Capsule erect or subinclined. 



122. PLATYGYRIUM, Bruch & Schimp. (PL 5.) 

 Plants intricate, cespitose, pinnately ramulose. Leaves 

 densely crowded, spreading when moistened, imbricate when 

 dry, subscarious, glossy, ecostate; areolation narrowly rhom- 

 boidal above, sublinear in the middle, larger and quadrate at 

 the angles. Flowers dioecious. Calyptra dimidiate, long, 

 twisted. Capsule oblong, cylindrical and regular. Operculum 

 long and narrowly conical, blunt at the apex, smooth. Teeth 

 of the peristome free to below the orifice of the capsule, nar- 

 rowly lanceolate, hyaline on the borders ; segments free to the 

 base, narrow, linear, as long as the teeth ; cilia none. Annulus 

 very large, comj^ound, persistent. 



1. P. repens, Bruch & Schimp. Tufts bright yellowish 

 green : leaves ovate or oblong-lanceolate, acute, concave, 

 recurved on the borders, very entire ; perichaetial leaves loosely 

 imbricate, longer : capsule dirty yellow, brown when old ; teeth 

 orange, hyaline on the borders ; segments of the same color. — 

 Bryol. Eur. t, 458. Pterigynandrum repens^ Brid. Muse. Recent. 

 Suppl. i. 131. Fterogonium^ Schwaegr. Suppl. i. 100, t. 27. 



