NEW SPECIES OF POLYGONUM. 201 
glabrous and glandless above, rather copiously pellucid- 
glandular beneath when young, later whitish-tomentulose, 
the margin very minutely spinulose-serrulate under a lens: 
ocreæ hyaline above, purple-nerved below, a red-purple ring 
around the nodes at base: peduncles glandular-scabrous; the 
very small perianths rose-color: achenes round-oyate acute. 
Tules of Grand Rond Valley, eastern Oregon, August, 
1897, W. C. Cusick; distributed for P. Persicaria, though its 
real affinities are with P. lapathifolium and its allies; yet, 
by its gland-dotted lowerleaf-face, it is again divergent 
from all other members of that group. 
P. ancuatum. Perennial, not slender, the stems several 
feet long and nearly prostrate, not branched, assurgent at 
summit and there bearing one or more long linear slender- 
peduncled spiciform racemes; internodes of the stem an 
inch or more long, acute, smooth and glabrous, reddish: 
ocreæ cylindric, thin, without herbaceous border, closely 
and rather coarsely appressed-strigose and long-ciliate: leaves 
about 3 inches long, linear-oblong to lance-linear, obtusish, 
obscurely punctate, glabrous except as to midvein beneath 
and margin, these closely appressed strigulose, each marked 
with a dark blotch above the middle; perianths small, 
pinkish, not glandular, their segments very obtuse; achenes 
minute, nearly orbicular, shining, but under a lens scrobi- 
culate. 
Bed of Napa River, above Hunt’s Meadow, Napa Co., 
California, 5 Nov., 1894, F. T. Bioletti. The locality is under 
the influence of tidal water, the soil therefore subsaline. 
Since the time, now long past, when the initiative was 
taken by me in the critical investigation of far-western 
forms of the Avicularia section,! the number of recognized 
1 Bull. Calif. Acad. i. 124-126 (1885). 
