361 
apex, petioled, two to six inches long, ciliate-margined; sheaths 
semicylindrical, slightly pubescent, long; inflorescence panicu- 
lately racemose; flowers in rather loose, lax spikes which are 
about one inch long; calyx five-parted; stamens eight; style 
three-parted, very short; achene triquetrous, oblong, chestnut- 
brown, smooth. 
California: (Cuming 229, type; Bridges 290), Donner Pass 
(Torrey 425); Coast of Mantchuria (Wilford). 
The species here proposed has been confounded with P. a/- 
pinum, to which it is related but is plainly distinct. In 1867 
it was sent to Meisner by Lenormand. Meisner saw directly 
that it was distinct from related species and left the following 
record on the label ‘‘ Polygonum phytolaceefolium nob. (25./6/67)” 
but so far as I can find he never published it, as was the case with 
a number of his other manuscript names. 
34. POLYGONUM DAVISI&, Brewer, in A. Gray, Proc. Am. Acad- 
viii. 399 (1872). 
California; Alameda Country (Miss Davis), Hermit Valley 
(Brewer, 2105), Placer County, on Truckee River (Sonne); Wash- 
ington: Yakima Region, 6,000 ft. (Tweedy), Mt. Hood, 6,000- 
8,000 ft. (Howell). 
The type of this peculiar and interesting Polygonum is glab- 
rous, but densely tomentose specimens have been collected on 
some of the higher mountains along the Pacific coast. If suffi- 
cient material can be secured which will exhibit enough and con- 
stant characters there may be reason for describing these as a 
variety of the above species. 
SECTION V.—AVICULARIA. 
1. Plants prostrate. 
35. POLYGONUM AVICULARE, L. Sp. Pl. 362 (1753). 
Thoughout North America and at various localities in Mexico 
and South America. 
36. POLYGONUM LITTORALE, Link, in Schrad. Journ. i. 54 ; 
(1799). 
P. salsuginosum, Wallr. Linnza, xiv. 568 (1840). 
P. aviculare, l., var. littorale, Mert. & Koch, in D. FI. iii. 59 
1831). 
