582 | POLYGONACE 4 POLYGONUM 
_ spike-like inflorescence more or less interrupted. 
Pp. Douglasii Greene Bull. Cal. Acad. i, 125. Glabrous and more or 
less glaucescent except the more or less scabrous nodes: stem slender, 8-16 
inches high erect usually somewhat strictly branched: leaves oblong to 
lanceolate, 6-30 lines long, mostly acute, often cuspidate, acuminate at 
base, sessile or nearly so, the margins often revolute: ocreae 5-6 lines 
long: flowers one to several in the axils of the upper leaves, on reflexed 
pedicels: calyx greenish, 1-2 lines long, 5-parted to near the base, the seg- 
ments oblong with whitish or rose-colored margins: stamens 8, included: 
style very short, 3-parted. In dry places in the mountains of Brit. Columbia 
to California and Nebraska. 
P. montanum Greene Pl. Baker. 18. P. Douglasii var. latifolium 
Greene Bull. Cal. Acad. 125, ‘* Low,fastigiately branched from the-base,3 
to 6 inches high, the branches floriferous from the base, but the flowers 
few among the proper leaves, most.of them forming a mere bracted spike 
beyond the foliage, all the angles of stem and branches denticulate-scaber- 
ulous, and other parts also more or less scrabro-puberulent: leaves oblong-- 
lanceolate, very acute, often an inch long.1l-nerved, the nerve sharply cari- 
nate beneath the leaf: perianth subsessile but nodding, its segments dark 
green or purplish except marginally and completely enclosing the achene, 
this black, smooth and shining, the faces obtusely rhomboidal, the cross- 
section 3-lobed rather than triangular.’”’ On high mountains, Brit. Co- 
lumbia to California and the Rocky Mountains. 
P. Howellii Greene Pl. Baker. 14. Stem erect, 4-12 inches high, 
sparingly branched from the base, the branches erect: leaves elliptic- 
oblong to lanceolate, very acute and apiculate, attenuate at base, 6-12 lines 
long, the thin margins serrulate-scabrous: ocreae scarious, 2-4 lines long, 
2-parted : flowers 1-3 in the axils of all the leaves, erect on erect pedicels: 
calyx whitish, about a line long, 5-parted to near the base, the segments 
oblong: achenes wholly invested by the calyx, very black and highly pol- 
ished, the faces rhombic-ovate. On top of the Siskiyou Mountains along 
the Happy Camp trail in California, perhaps in Oregon farther east. 
P. Sawatchense Small Bull. Torr. Bot. Club xx, 213. Glabrous and 
more or less scurfy or papillose throughout: stem erect, 2-8 inches high: 
leaves oblanceolate or obovate to almost linear, 3-12 lines long, acute at 
the apex, acuminate below, sessile, flat or revolute: ocreae at length lace- 
rate to the middle: flowers in clusters of 2-4 in the axils of all the leaves: 
calyx green, on erect pedicels, a line or less long, 5-parted to near the base, 
the segments oblong, obtuse: stamens 6-8: style almost none. In the moun- 
tains, Washington to Colorado and Dakota. 
P. ramosissimum Michx, Fl. i, 237. Glabrous throughout: stem erect 
or ascending, 4-12 inches high, nearly simple or diffusely branched : leaves 
lanceolate to oblong, 4-20 lines long, acuminate at both ends, short- 
petioled, persistent: ocreae 3-9 lines long, early becoming lacerate: flowers 
in small clusters in the axils of the upper leaves: calyx greenish or yellow, 
about a line long, erect, on erect pedicels, 5-parted or 6-parted to near the 
base, the segments narrowly oblong: stamens 6 or fewer, included: style 
very short, 3 parted to the base. lithe mountains, eastern Washington 
to California and the Atlantic States. 
P. Engelmanni Greene Bull. Cal. Acad. i, 126. Glabrous: stem 
very slender and wiry, 2-8 inches long, nearly cont 3 or diffusely branched 
from the base: leaves linear-lanceolate, 1-6 lines long, light green or glau- 
cous, beneath, acute, sessile: ocreae funnelform, about 2 lines long. at 
length slightly lanceolate: flowers in small fascicles in the axils of all the 
leaves, nodding on reflexed pedicels: calyx dark green, a line long, 5-parted 
to near the base, the segments oblong, obtuse, with whitish border: sta- 
