422 STANDLEY: CHENOPODIACEAE 
known reason has found conditions in America particularly favor- 
able for its spread. In the present instance, however, there seems 
to be no great harm involved, and the plant may even be bene- 
ficial if it is useful as forage. Probably within a few years it will 
have spread throughout the Great Plains region and the territory 
westward to the Pacific Coast. 
The oldest western specimens in the National Herbarium were 
collected in Wyoming in 1897. The first Oregon specimens were 
obtained in 1901, and all those from other western states. still 
later. 
ATRIPLEX SACCARIA S. Wats. Proc. Amer. Acad. OFA) Tee 
Atriplex cornuta Jones, Proc. Calif. Acad. II. 5: 718. 1895. 
Among North American species this is remarkable in having 
strongly dimorphous fruiting bracts. In certain other species 
also the bracts vary greatly upon a given plant, but in none, except 
the abnormal A. hortensis L. and its allies, do these parts exhibit 
such striking variation as in A. saccaria. The name saccaria has 
been ignored by recent writers upon western plants. It was 
based upon specimens showing only the small fruiting bracts (the 
large ones had fallen off, doubtless); hence it is not remarkable 
that the species has been wrongly identified from the description, 
and that Mr. Jones once regarded it asa variety of A. truncata 
(Torr.) A. Gray. 
ATRIPLEX SORDIDA Standley, N. Amer. Fl. 21: 47. 1916 
Of the A. argentea group, differing from that species in the 
sessile, wholly alternate leaves, and from A. expansa S. Wats. in 
the terete branches, coarse and loose pubescence, and smaller seed. 
The type was collected in the San Jacinto Valley, California, in 
1880, by G. R. Vasey (No. 549). A collection from Santa Monica, 
California (Parish 1124), also belongs here. 
~ ATRIPLEX MOHAVENSIS (Jones) Pdepatcy N. Amer, Fl. 21: 47. 
1916 
Atriplex expansa mohavensis Jones, Contr. West. Bot. 12:20. 1903. 
‘This name applies to the common plant of central and southern 
California which has passed as A. expansa S. Wats. The latter, 
