— 109 — 
B. Leaves patent when dry; those of branches us. denticu- 
late all around. Monoecious or (B. luteolum) dioecious, r. syn- 
oecious. 
a. Leaves entire or (at acumen) faintly sinuolate. 
7.B.mamilligerum Kindb. cat. Can. m. 
Leaves large narrowly ovate-lanceolate with long subulate 
filiform-pointed acumen, not or indistinctly recurved below, not 
densely crowded, nearly spreading when moist; alar cells not 
well-defined, the few lowest basal short, the others linear; costa 
vanishing in middle or longer. Perichetial leaves with long 
filiform point. Capsule suboval or arcuate not large; cilia not 
appendiculate; annulus none; lid mamillate; pedicel long. Tufts 
yellowish faintly glossy, very dense and radiculose. Stem sub- 
pinnate; branches faintly compressed. — Wet logs near springs 
r. Amer, Can. Brit. Col.: Macoun. 
b. Leaves distinctly denticulate. 
aa. Alar leaf-cells small green well-defined. Perichetial 
leaves obtuse. Dioecious r. fruiting. 
8.B.luteolum C. Mueller. — Hypnum C. M. syn.; Brachythe- 
cum Kindb.; »B. letum» Schimper, non Bridel. 
; Leaves large with shortish acumen; cells eublinear exc. the 
. alar; costa sometimes reaching into base of acumen. Stem- 
leaves ovate or ovate-oblong denticulate above and filiform- 
pointed; branch-leaves ovate-oblong or broadly ovate-lanceolate, 
dentieulate all around. Capsule suboblong arcuate or suberect; 
cilia not appendiculate; annulus none; lid short-apiculate; pedicel 
not long. Tufts green often glossy and radiculose. Branches 
often pinnate. — On calcareous or basaltic rocks, r. on trees, 
r. Eur. Switzerl., Norway! Germany: Geheeb; Roemer. j 
bb. Lowest basal cells nearly uniform and dilated. Peri- 
chetial leaves acute. Monoecious us. fruiting. 
9.B.salebrosum Hoffmann. — Hypnum Hoffm.; Brachythe- 
cum Br. eur; B. Rotæanum Notaris; B. sericeum Warnstorf; 
^Hypnum plumosum Hudson»: Lindb. 
Leaves large ovate-lanceolate with subulate us. long and often 
filiform-pointed acumen, denticulate all around, us. recurved; 
: lowest basal cells large subquadrate, the others linear-lanceolate; 
= Costa us. vanishing near middle. Perichetial leaves us. with a 
: faint costa. Capsule large arcuate; cilia us. appendiculate; 
. Anuulus narrow subpersistent; lid apiculate or acute; pedicel us. 
= not long. Tufts more or less radiculgse, us. pale or dirty 
. Been. Stem gen. not pinnate, — On stones and earth or on 
