352 
Nevada: Parley’s Park, 6,000 ft. (Watson, 1068); Arizona: Wil- 
liams (Rusby, 819); Mogollon Mountains (Mearns, 84); Califor- 
nia: Santa Rosa Creek (Bigelow); foothills of the Sierra Nevada 
(Torrey, 428); Green Horn Mountains 6,000-7,000 ft. (Palmer, 
99); Washington: Yakima Region (Tweedy). 
v Var. LINEARIFOLIUM (S. Wats.) 
P. Bistorta, L., var. linearifolium, S. Wats. Bot. King’s Exp. 
317 (1871). 
Nevada: E. Humboldt Mountains 9,500 ft. (Watson, 1069); 
Colorado: Pass Creek, Bridges Pass (Engelmann); Valley of the 
Lower Platte (Fremont). 
Pursh in his Flora of North America published a Polygonum 
bistortoides, giving as its habitat the banks of the Missouri River. 
Later the plant was found throughout the west, though princi- 
pally in the mountains. Very few authors accepted Pursh’s 
opinion and name, and in subsequent publications the plant was 
referred to P. Bistorta of Europe. However, this disposal of the 
case is erroneous. Although the plant has the general appear- 
ance of the European species, it has enough constant characters 
to maintain it as a species as Pursh first ranked it. 
Instead of the broadly ovate, cordate radical leaf of P. Bistorta, 
P. bistortoides has an oblong leaf, which is generally acuminate at 
the base. The achene instead of being oblong is narrowly obovoid 
with a narrower seed. 
2. POLYGONUM VIVIPARUM, L. Sp. Pl. 360. (1753). 
Iceland: (C. S. Smith); Greenland. Disco Isiand (Burk); 
Arctic America: (Parry, Richardson); Vermont: Mt. Mansfield 
(Pringle); New Hampshire: White Mountians, Alpine Garden 
(Schrenk), Great Haystack Mountain (Tuckerman); Colorado: 
Gray’s Peak, 12,500 ft. (Letterman); Utah: Bear River Canon, 
11,000 ft. (Watson); Oregon and Washington: (Wilkes U. S. 
Exp. 689); Alaska: St. Paul’s Island (White); Juneau (Miss 
Cooley). 
SECTION II.—PERSICARIA. 
1, Ocree setose or ciliate. 
3. POLYGONUM PERsIcaRIA, L. Sp. Pl. 361 (1753). 
P. Valdivianum, Phil., according to specimen in Herb. J. 
Donnell Smith. 
