REVISION OF EPILOBIUM. 79 
Turioniferous plants only exceptionally branching, not 
glaucous. 
Leaves petioled, small and spreading, 
o.ee-eH. leptocarpum, var. Macounii. 
Leaves frequently petioled, ample. 
Alaskan: branching, leafy: leaves serrate, drying’ 
Gark ....-0. Sep uigeeac Cut case shee ..--Z. boreale. 
Of the Columbia region: simple, less leafy: leaves. 
low-denticulate, light green ........H. delicatum. 
Leaves sessile (or subpetioled in saximontanum if 
looked for here, and as to occasional leaves of 
brevistylum). 
Some leaves clasping-decurrent: stem mostly sim- 
ple: seeds obtuse below, gradually tapering above 
into a broad pale beak............-..+-H. Halleanum. 
Leaves not decurrent: seeds. acute below, more abruptly 
short-beaked. 
Leaves medium-sized: petals about 5 mm.: seeds: 
rather acute at top.- 
Pubescence long and spreading below, 
seers HE. ursinum. 
Pubescence not pilose. 
Leaves narrow, typically erect, acute, 
seeed E. Drummondii. 
Leaves ovate-lanceolate, acute: stem very 
crisp-pubescent above,..young LZ. boreale. 
Leaves ovate, more obtuse, drying pale: 
pubescence scanty........ 2. brevistylum. 
Leaves ample, broadly ovate, the upper often ex- 
ceeding the inflorescence, drying dark: petals 
about 7 mm. : seeds obtuse at top...#. glandulosum. 
Soboliferous, ascending at base, at length often cespitose or 
with sterile basal shoots. 
Glaucous, without pubescent lines: leaves subsessile, 
..broad-leaved EZ. glaberrimum, and its var. latifolium. 
Not glaucous, crisp-pubescent in lines: leaves evidently 
petioled, rather thin.....--..++-+++- -H. Hornemanni. 
Stoloniferous, ascending at base, quite cespitose: leaves 
small for the group, often nearly sessile, firm, 
ceeeee EX, Clavatum. 
