294 FRYE 



Leaves oblong, clasping at base, narrowly lanceolate above, con- 

 vex and smooth on back. Margin incurved, distantly serrate from 

 the middle up. Lamellae 35-45, 3-7 cells high; marginal cells 

 rough, oval, higher than wide. Inner pericha^tial leaves with long 

 convolute base and short acumen. 



Calyptra fugacious, with few appressed hairs, split on one side, not 

 curved, sHghtly 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 caespitose, olive to 

 dark green. Stems erect, simple or branched above. 



Leaves when dry crisped, appressed or spreading more or less, lan- 

 ceolate to Hnear-lanceolate, usually with a sheath-like base, sheath 

 and lamina i cell thick; lamina smooth at back. Margin not 

 incurved, usually sharply serrate, not bordered. Lamellae mostly 

 very numerous (at least 35 in the included species), not at all or very 

 little wavy from side to side, entire, rarely few to 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 Hnear. 



Cal>ptra with long smooth hairs at tip which usually form a felted 

 mat covering the whole surface. 



Capsule erect or incHned, straight, sometimes slightly curved, 

 terete, sometimes slightly ribbed, cells of epidermis usually mamil- 

 lose; without stomates, except in P. alpimwi; hypophysis wanting or 



'' 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' 

 descri[)lion of the capsule of the genus (Engler & Prantl. Nat. Pllanzenf. Teil i, Abt. 

 3, s. 682) as " 2-kantig, in Querschnitt halbmondformig " does not hold as shown by the 

 cross sections of the capsule in the plate. 



