32 memoirs fr(_1m the department of botany of columbia college. 



[Plate 3.] 

 3. Polygonum alpinum Allioni. 



Poh/(jonniii alpinum Allioni, Fl. Pedem. 2: 206. t. 68. f. 1 (1785); Persoon, Syn. 1: 

 440; :Meisner, Monog. 56; Hooker, Fl. Bor. Am. 2: 131. 



Pohjgo)ium iiolyiaorphum Ledebour, Fl. Ross. 3: 524 (1849); Meisner in DC. Prodr. 

 14: 130; Greene, Fl. Francis, 137. 



Pol'i/gonuin polymorphum yar. alpinum Ledebour, Fl. Ross. 3: 524(1849); Meisner 

 in DC. Prodr. 14: 139; S. 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, 3-18 cm. long, 

 1-4 cm. 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, 

 Hght 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. foliosum 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; fiowers fewer; achene broadly 

 oblong, greenish. 



High mountains of Washington, about 6,000-7,000 feet altitude. 



