CATALOGUE. 
317 
Polygonum lapathifolium, Ait., Var. incanum, Koch. New York, 
Lake Superior region and on tlie Saskatcliewan ; rare. In Provo Cailon of 
the Wahsatch; 6,000 feet altitude; July. (D. C. Eaton.) 
Polygonum viviparum, L. White Mountains of New Hampshire, and 
from Lake Superior to Labrador and the Arctic Sea, Greenland and Behring 
Strait; southward in the mountains to Colorado and California. Clover 
Mountains, Nevada, and in the Uintas; 8-11,000 feet altitude; July-Sep- 
tember. (1,067.) 
Polygonum Bistorta, L. DC. Prodr. 14. 125. Rhizoma thick and 
twisted ; stems annual, very simple ; sheaths long and striatcly nerved ; leaves 
glabrous or puberulent beneath, the lowest cordate, obtuse, with a long 
winged petiole, the upper subsessilc, the highest linear or abortive ; spike 
dense, oblong, obtuse ; pedicels exceeding the flowers ; stamens exserted. — 
Var. OBLONGiFOLiUM, Meisn. Stem simple, j-2° high ; leaves glabrous, the 
lowest oblong, the blade 3-8' long, 1-2' broad, scarcely decurrent by an ab- 
ruptly attenuate base into a very long petiole ; spike oblong, i-2' long. — From 
Behring Strait and the Arctic Coast southward in the mountains to Califor- 
nia and New Mexico. East Humboldt and Clover Mountains, Nevada, and 
in the Wahsatch and Uintas; 6-9,000 feet altitude ; J uly-Septcmber. (1,068.) 
Var. linearifolium. Leaves very narrow, attenuate at base, 3-6' long, 
1- 4" wdde; spike short, (6-9";) stem 1^° high. — East Humboldt Mountains, 
Nevada ; 9,500 feet altitude. (1,069.) 
Polygonum Convolvulus, L. Jordan Valley, Utah; introduced. (1,070.) 
Polygonum (Aconogonon) polymoepiium, Ledeb. DC. Prodr. 14. 139. 
Stem erect, branched; sheaths large, membranous, pubescent, striately 
veined, not ciliate, obliquely truncate, soon lacerate, subdeciduous ; leaves 
short-petioled, ovate-oblong, lanceolate or linear, narrowed or rounded at base, 
ciliolate, pubescent or glabrous; panicle terminal, exceeding the leaves, of 
compound many-flowered racemes; bracts small, membranous, not ciliate, 
2- 3-flowered ; pedicels exserted, in fruit shorter than the calyx ; calyx pcta- 
loid, S-jiarted, not glandular, slightly enlarging ; stamens 8 ; style veiy short, 
3- cleft ; achenium triangular, equaling or scarcely exceeding the calyx, smooth 
and shining, with oval-rhomboid faces ; cotyledons accumbent, sunk in a de- 
pression of the albumen. Var. a. alpinum, Ledeb. Stem glabrous ; sheaths 
pilose or rather rarely glabrous ; leaves ovate-oblong or lanceolate, acuminate, 
shortly attenuate at base, flat, slightly pubescent, or glabrate above ; ])ixmc\e 
