STANDLEY: CHENOPODIACEAE 419 
Massachusetts, in 1878, is probably C. vagans, but the plant is too 
young for definite determination. 
CHENOPODIUM AMBROSIOIDES L. Sp. Pl. 219. 1753 
This species, a native, presumably, of tropical America, is now 
widely diffused through the tropics of both hemispheres, and is 
naturalized in many regions far outside the tropics, especially in 
North America. As a consequence of its extensive range it 
exhibits much variation, but none of the forms seem worthy of 
specific recognition and few of them of rank as subspecies. C. 
anthelminticum L., which has been recognized in most North 
American manuals as a species or subspecies, does not seem to be 
worthy nomenclatural recognition. It is apparently nothing 
more than a poorly marked seasonal variation. 
CHENOPODIUM FARINOSUM (S. Wats.) Standley, N. Amer. FI. 21: 
28. 1916 
Chenopodium murale farinosum S. Wats. Proc. Amer. Acad. 9: 97. 
1874. © 
Although described as a variety of C. murale L., this plant is 
far removed from that species and finds its nearest ally in C. 
glaucum L., differing from the latter in its large size and large 
glabrate leaves. In North America it seems to be confined to 
California, but, like some other Californian plants, it occurs also 
in western South America and in Paraguay. The following col- 
lections are representative: a 
CALIFORNIA: without locality, 1853-56, C. Wright; Santa 
Cruz Mountains, A. E. Hitchcock 183; Nigger Slough, Los Angeles 
County, Braunion 558; San Francisco, Bolander 2489 (type). 
CHENOPODIUM SALINUM Standley, N. Amer. FI. 21: 29. 1916 
_ Theabove name isproposed for the native North American plant 
which has been referred to the Old World C. glaucum. The latter 
is rather sparsely adventive from New Brunswick to Virginia and 
as far west as Nebraska. C. salinum ranges from Manitoba and 
Alberta to New Mexico and Arizona, and has been collected in 
Missouri, where, doubtless, it is adventive.. The North American 
plant has stout, dense, short, mostly axillary spikes of flowers, 
