94 51EM0IRS FEOM THE DEPARTMENT OF BOTANY OF COLUMBIA COLLEGE. 



[Plate 34.] 

 34. Polygonum Paronychia Chamisso & Schlechtendal. 



Polygomim Paronychia Chamisso & Schlechtendal, Ijinnsiea, 3: 51 (1828); Hooker, 

 Fl. Bor. Am. 2: 132; Meisner in DC. Prodr. 14: 89; S. Watson, Bot. Calif. 2: 10; Behr, 

 Fl. San Francisco, 275 ; Greene, Fl. Francis. 133. 



Perennial, suflfruticose, glabrous, bright green and glaucous throughout. Stem pros- 

 trate or ascending or both, 3-9 dm. long, diffasely and irregularly branched from the 

 base and throughout, the older portions covered with a loose scaly bark and the persistent 

 ocreae; leaves oblong or oblong-lanceolate, .5-2.5 cm. long, .3-. 8 cm. broad (apparently 

 linear or linear-lanceolate on account of the strongly revolute margins) scattered along 

 the stem and branches or crowded in subcapitate clusters at the ends of the branches, 

 sessile, pitted on the upper surface, acute or acuminate at the base, with a broad two- 

 winged keel on the midrib beneath, articulated at the junction with the ocreae, the mar- 

 gins and wings of the keel more or less ciliate; ocreae funnelform, 1-1.7 cm. long, mostly 

 contiguous, early lacerate, silvery, the segments becoming hair-like with age, and the 

 bases turning brown ; inflorescence axillary, consisting of clusters bearing several flowers, 

 crowded into subcapitate clusters near the ends of the branches ; pedicels 3 mm. long ; 

 calyx white, 5-7 mm. long, five-parted to below the middle or near the base, the seg- 

 ments obovate or oblong, dark- veined; stamens eight, included; style 1.5-1.8 mm. long, 

 equally or unequally cleft to above the middle, included; achene triquetrous, 4.5-5 mm. 

 long, sometimes approaching a tetragonous form by a conspicuous groove in place of one 

 of the angles, somewhat rhomboidal, ovoid or oblong, black, smooth and shining. 



On or near the coast from Santa Cruz, California, north to Vancouver Island. 



