Be MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA COLLEGE. 
[Pate 3.] 
3. Polygonum alpinum Allioni. 
Polygonum alpinum Allioni, Fl. Pedem, 2: 206. ¢. 68. f. 1 (1785); Persoon, Syn. 1: 
440; Meisner, Monog. 56; Hooker, Fl. Bor. Am. 2: 151. 
Polygonum polymorphum Ledebour, Fl. Ross. 8: 524 (1849); Meisner in DC. Prodr. 
14: 139; Greene, Fl. Francis, 137. 
Polygonum polymorphum var. alpinum Ledebour, Fl. Ross. 3: 524 (1849); Meisner 
in DC. Prodr. 14: 139; 8. Watson, Bot. King’s Exp. 317; .Bot. Calif. 2: 15. 
Perennial, stout, glabrous or slightly pubescent throughout, bright green. Stem 
erect, 9-20 dm. long, channeled, more or less branched; leaves lanceolate, 5—18 cm. long, 
1-4 em. broad, acute or acuminate at the apex, mostly acuminate at the base, coriaceous, 
slightly crisped, short-petioled ; ocreae funnelform, 1-3 cm. long, oblique and two-cleft, the 
segments acute, mostly glabrous, large and loose, brittle and early falling away; inflores- 
cence paniculate, the divisions consisting of compound racemes or paniculate racemes ; 
‘racemes loosely flowered, 1-4 cm. long; ocreolae funnelform, about 1 mm. long, oblique 
and shallow; pedicels slender, 3 mm. long; calyx greenish or whitish, 3 mm. long, five- 
parted to near the base, the segments obovate or oblong, rounded; stamens five to eight, 
included; style about .5 mm. long, three-parted to near the base, included; achene tri- 
quetrous, 4 mm. long, broadly ovoid or oblong, acute, protruding beyond the calyx, 
light chestnut colored or brownish, smooth and shining. 
Subalpine and alpine parts of the mountains of Nevada, California, Oregon and 
Idaho. Also in Europe and Asia. 
Polygonum alpinum foliosum (Keller) Small. 
Polygonum polymorphum var. foliosum Keller, Bull. Soc. Bot. Belg. 30: 49 (1891). 
Polygonum alpinum var. folioswm Small, Bull. Torr. Club, 19: 360 (1892). 
Stout, pubescent throughout. Stem sparingly branched, hispid; leaves ovate-lanceo- 
late, acute, petioled, more or less tomentose beneath, ciliate, numerous near the ends of 
the branches; ocreae funnelform, large, loose, hispid; flowers fewer; achene broadly 
oblong, greenish. 
High mountains of Washington, about 6,000-7,000 feet altitude. 
