156 BRYACE.E. [Ptychomitrium. 



51. PTYCHOMITRIUM, Bmch & Schimix (PL 2.) 

 Plants of various size, fasciculate-subcespitose, branching by 

 simple innovations from the base. Leaves long, often curling ; 

 cells of the areolation minute, round or quadrate, opaque in the 

 upper part, linear-elliptical or hexagonal-rectangular at base. 

 Calyptra covering the capsule to the middle, plicate, naked or 

 squamulose, sublobate on the borders. Capsule symmetrical, 

 erect, on a long straight pedicel. Lid acicular. Teeth nar- 

 rowly linear-lanceolate, long, divided to near the base into two 

 subulate free or partly agglutinate rarely entire segments. 

 Annulus large, compound. 



Subgenus I. PTYCPIOMITRIUM, proper. 

 Plants large, in soft tufts. Leaves narrowly lanceolate, 

 acuminate, dentate at the apex. Capsule single or many from 

 the same perichaetium. Teeth equally filiform-bifid. Flowers 

 monoecious. 



1. P. Gardner!, Lesq. Tufts dark green : leaves close, 

 oblong, with borders slightly reflexed, lanceolate, acuminate, 

 sharjily denticulate above: calyptra smooth: capsule oval 

 oblong ; lid long, needle-form, persistent ; teeth thick, generally 

 cleft nearly to the base into three blood-red segments ; annulus 

 compound. — Mem. Calif. Acad. i. 16. 



Hab. On rocks; Dardanelles Caiion, California (Bolander). 



The species differs from the European P. polyphylhun in its larger size 

 and green color, the leaves shorter, broader, and more acutely dentate, 

 the basilar areolation longer, the upper quadrate and more compact, the 

 shorter pedicel, the pale brown capsule longer and with a larger lid, the 

 teeth broader and trifid, the annulus narrower, etc. The male flowers are 

 rarely axillary, but generally placed two or more at the base of the vagi- 

 nule within the perichaetium. 



Subgenus II. NOTARTSIA. 



Plants very small, loosely tufted. Leaves shorter, muticous, 

 entire. Capsule solitary, shorter-pedicellate. Teeth narrower, 

 linear-lanceolate and entire, or broader and divided above into 

 two or three unequal segments, spreading when dry. 



