132 MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA COLLEGE, 
[Piare 53.] 
53. Polygonum Nuttallii Small. 
Polygonum intermedium Nuttall; 8. Wats. Proc. Am. Acad. 17: 378 (1882), not Ehrh. 
Annual, slender, wiry, glabrous throughout. Stem erect, .8-3 cm. long, simple or 
irregularly and divergently branched, dark red, four-angled and slightly winged especially 
above; leaves varying from linear-lanceolate to linear-oblanceolate, .8-3 cm. long, .2-.3 
em. broad, acute, sessile, glaucescent beneath, more or less revolute, articulated to the 
ocreae; ocreae funnelform, 3-4 mm. long, oblique, at length lacerate; inflorescence axil- 
lary, consisting of several-flowered clusters, mostly confined to the ends of the branches 
and appearing as terminal racemes by the shortening of the internodes; pedicels 1.5-2 
mm. long, slender, reddish; calyx greenish, 2.5 mm. long, five-parted to near the base, 
the segments oblong with pinkish margins; stamens eight, sometimes fewer, included, 
the filaments conspicuously dilated at the base; style .8 mm. long, included, three-parted 
to the base; achene triquetrous, 2-2.8 mm. long, ovoid or sometimes ovoid-oblong, 
slightly constricted near the apex, black, smooth and shining. 
British Columbia to Oregon. 
