294 FRYE 
Leaves oblong, clasping at base, narrowly lanceolate above, con- 
vex and smooth on back. Margin incurved, distantly serrate from 
the middle up. Lamelle 35—45, 3—7 cells high; marginal cells 
rough, oval, higher than wide. Inner perichetial leaves with long 
convolute base and short acumen. 
Calyptra fugacious, with few appressed hairs, split on one side, not 
curved, slightly twisted. 
Capsule slightly inclined, cylindric-oblong, ventricose below, 
bluntly 2—4 angled," plicate-rugose at base when empty. Teeth 
64. Lid broadly conic, subulate-rostrate. Pedicel long, flexuous. 
—On soil.—In mountains from British Columbia southward to 
Colorado, Nevada, and California. 
POGONATUM P. Beauv. 
Name derived from pogon = beard; referring to the hairy calyp- 
tra. 
Plants dioicous (in species included), loosely czespitose, olive to 
dark green. Stems erect, simple or branched above. 
Leaves when dry crisped, appressed or spreading more or less, lan- 
ceolate to linear-lanceolate, usually with a sheath-like base, sheath 
and lamina 1 cell thick; lamina smooth at back. Margin not 
incurved, usually sharply serrate, not bordered. Lamelle mostly 
very numerous (at least 35 in the included species), not at all or very 
little wavy from side to side, entire, rarely fewto wanting. Vein 
toothed at back toward apex, sometimes smooth, wide, many cells 
thick. Cells of lamina small, thick walled, round-hexagonal; cells of 
sheath rectangular to linear. | 
Calyptra with long smooth hairs at tip which usually form a felted 
mat covering the whole surface. 
Capsule erect or inclined, straight, sometimes slightly curved, 
terete, sometimes slightly ribbed, cells of epidermis usually mamil- 
lose; without stomates, except in P. alpinum; hypophysis wanting or 
'S This species is described in Lesquereux & James’ Manual as having the capsule 
biplicate and semilunar in cross section. ‘There are however two other faint angles 
extending part way up from the base, making it 4-angled at least below. Brotherus’ 
. description of the capsule of the genus (Engler & Prantl. Nat. Pflanzenf. Teil 1, Abt. 
3, s. 682) as ‘‘2-kantig, in Querschnitt halbmondférmig” does not hold as shown by the 
cross sections of the capsule in the plate. 
