—- 268 — 
97.B.horridifolia C. M. et Kindb. 1. c. i 
Differs from the both last and B. vinealis in leaves faintly 
papillose loosely disposed long-decurrent. Leaves from ovate 
base narrowed to a longer and long-subulate acumen, falcate 
when moist, crisped or spreading when dry; basal cells pellu- 
eid short-rectangular, the inner larger; costa broader below 
vanishing in apex, not excurrent. Capsule cylindric; teeth red- 
dish scarcely more than once contorted with long in dry state 
spreading points. Tufts somewhat high, brown or rusty red 
below, greenish at tops. — Damp rocks r. Amer. Can. Pacif. 
distr.: Macoun. 
98.B.tortellifolia C. M. et Kindb. 1. c. 
Differs from the last: Leaves broader, less distinctly decurrent; 
the comal larger and crowded with short-excurrent costa. Pe- 
richetial leaves suddenly tapering to a long narrow acumen; 
costa slightly excurrent. Peristome whitish. Tufts often higher 
sometimes quite red. — Wet rocks. Amer. Pacif. distr. princ. 
near sea. Can. less r.: Macoun. 
b. Leaves also the uppermost nearly smooth; upper cells 
pellucid well-distinct. 
99.B.robustifolia C. M. et Kindb. 1. c. 
Leaves shorter and more crowded than in the last, from 
ovate base narrowed to the subulate acumen, reflexed nearly 
to middle at one side, falcate or crisped; basal cells subquadrate 
hyaline; costa equally broad and distinct to apex, not excur- 
rent. Capsules unknown. Tufts dark brown or olive-green. 
— Rocks r. Amer. Pacif. distr, Can.: Macoun. U. S.: Roell. 
110. Ceratodon Bridel. 
A. Leaves carinate. Outer perigonial leaves long-acuminate | 
acute. 
l.C.purpureus L. — Mnium L.; Ceratodon Brid. Kr 
Leaves reflexed nearly all around, entire or slightly denticu- - 
late near apex, gen. not decurrent, us. broadly ovate-lanceolate 
attenuate not subulate at apex; cells small us. chlorophyllose; 
costa us. percurrent. Inner perichetial leaves (1 or 2) obtusate 
or short-acuminate. Capsule sometimes strumose us. curved - 
when dry; teeth with numerous articulations, often marginate; 
lid elongate-conic; pedicel red. Outer perigonial leaves with 
scarcely excurrent costa. Tufts us. not tomentose.  Dioecious. 
— Gravelly soil Hur. common. Sweden etc.| Amer. Can.: 
Macoun. no 
