13-i MEMOIRS FEOM THE DEPAKTMENT OF BOTANY OF COLUMBIA COLLEGE. 



[Plate 54.] 



54. Polygonum Kelloggii Greene. 



Polygonum Kelloggii Greene, Fl. Francis. 134 (1891). 



Polygonum coardatum var. minus Meisner in DC. Prodr. 14 : 101 (1856), not P. minus 

 Huds.; S. Watson, Bot. King's Exp. 316. 



Annual, low, slender, glabrous throughout, somewhat scurfy. Stem mostly erect, 

 1-5 cm. long, divergently branched from near the base, more or less four-angled, in some 

 cases slightly winged, internodes of the branches very short; leaves linear or linear- 

 lanceolate, .4-1 cm. long, 1-2 mm. broad, acute, sessile, crowded on the branches but 

 spreading and not imbricated, much the same size throughout, joined to the ocreae by 

 inconspicuous articulations; ocreae funnelform, 1-2 mm. long, oblique, thin and early 

 lacerate ; inflorescence axillary, consisting of clusters with several flowers, almost contigu- 

 ous on account of the very short internodes, the branches appearing like leafy racemes ; 

 pedicels .5 mm. long; calyx green, nearly 2 mm. long, five-parted to near the base, the 

 segments oblofig, obtuse, with whitish or cream-colored margins; stamens about five, 

 included; style often almost wanting; achene triquetrous, 1.5 mm. long, rhombic-ovoid, 

 light^broAvn, granular, somewhat striate, dull. 



Washington south to California and Colorado. 



