130 MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA COLLEGE. 
[Puatre 52.] 
52. Polygonum spergulariaeforme Meisner. 
Polygonum coarctatum Douglas; Hooker, Fl. Bor. Am. 2: 133 (1834), not Willd. ; 
Meisner in DC. Prodr. 14: 101; 5. Watson, Bot. King’s Exp. 316, Bot. Calif. 2: 12. 
Polygonum spergulariaeforme Meisner; Small, Bull. Torr. Club, 19: 366 (1892). 
Annual, scurfy throughout but especially about the nodes, glabrous, rather slender 
and wiry. Stem mostly erect, 1-5 dm. long, nearly simple and rather strict or corym- 
bosely-branched and sometimes diffuse, more or less angled; leaves linear-oblong or 
linear-lanceolate, sometimes oblanceolate, .4-3 cm. long, 1-7 mm. broad, occasionally 
almost linear, acute, sessile, usually revolute, conspicuously articulated to the ocreae; 
ocreae funnelform, .5-1 em. long, two-parted when young, at length lacerate; inflores- 
cence axillary, consisting of clusters with several flowers, confined mostly to the ends of 
the branches and appearing as terminal racemes by the shortening of the internodes; 
pedicels about 1.5 mm. long; calyx whitish or pink, 4 mm. long, five-parted to near the 
base, the segments obovate, obtuse, each with a dark green nerve; stamens eight, in- 
cluded, the filaments hardly dilated at the base; style .5—.8 mm. long, three-parted to the 
middle or sometimes to near the base, included; achene triquetrous, 3.5-4 mm. long, 
oblong, black, smooth and shining except the more or less granular apex and angles. 
Northwest Territory and British Columbia to California and Colorado. 
