1894.] North American Species of Amaranthus. 317 
One of the so-called “tumble weeds,” found everywhere from Arctic 
North America to Mexico. It is very variable in habit, assuming the 
spherical tumble weed shape in the upper Mississippi valley and on 
the western plains. nown from its habit and particularly from the 
numerous long pungent bracts. Certain upright forms with larger 
leaves and tardily dehiscent utricle resemble the erect A. Ca/ifornicus, 
ut the presence of long bracts points to A. grecizans. 
Var. pubescens, n. var. 
Diffuse, spreading from a common root-stock, covered with 
dense viscid pubescence, which at length causes the plant to 
be covered with sand and dust: leaves very much crisped: 
bracts broader and shorter, not so sharply pungent: sepals 
thicker and longer than in the species. —New Mexico and 
Arizona. 
Specimens examined: New Mexico, Silver City (Greene 
185 in 1880), Empire City (Torrey 457 in 1865), Camp 
Bache (Bigelow in 1852), place unknown, (Fendler 731 in 
1847); Arizona, Flagstaff (¥ones 3978 in 1884), San Fran- 
cisco Mts. (Knowlton 198 in 1879). 
= = Plant prostrate. 
. 22. A. CARNEUS Greene. Pitt. 2: 105. 1890. 
Prostrate, branches somewhat radiate, slender, pinkish, the 
glomerules and lower face of the leaves purple: plant florifer- 
ous throughout: leaves setose-tipped, 1.5 to 2.5™" long: bracts 
acuminate, setose-tipped (shorter than those of A. greci- 
zans): utricle smooth, seed 0.6" wide.—Montana, Idaho and 
Oregon. 
This species is too near A. grecizans in leaf,bract,floral,and seed char- 
acters; but in its depressed habit and an occasional reduction of sepals 
23. A. BLITUML. Sp. Pl. 990. 1753. 
See footnote under A. grecizans, p. 316. 
CP SP RE RN 
rd the plants referred toin Man. 6th. ed. from New York city and Boston — 
at name preve to be either 4. slitoides or A. lividus. It also serves to distin- 
the ha srecizans L. and A. sylvestris Desf. which are reduced to ergo 
name grecizans in the Kew Index. The latter stands as Moquin's idea © 
typical Blitum (A. Blitum i i : ee 
+ ognized by Planchon as identical with Linnzus’ type in herb. ' 
By Willdenow’s suggestion that perhaps 4. gr@cizans was not eastern all, A. 
whi oo eat en as the abundant Continental pd —. form, y nage 
Bern repea substantiated by the labels on the old specimens 
hardi herbarium, ‘i 
