420 STANDLEY: CHENOPODIACEAE 
with sparsely villous rachises, and finely tuberculate seeds; the 
European plant has slender, elongate, interrupted, axillary and 
terminal spikes with glabrous rachises, and smooth seeds. While 
the differences may not seem very great, they are easily recognized 
when the two forms are —— Phere seem to be no inter- 
mediate — 
BLITUM fg 
BLITUM VIRGATUM L. Sp. Pl. 4. 1753 
An Old World species, closely related to B. capitatum L., eat 
distinguished by the leafy rather than naked inflorescence, obtuse 
margin of the seeds, and copiously branched stems. It has - 
escaped recognition by American botanists, but specimens in 
various herbaria were collected long ago in Massachusetts and 
New York, probably mere waifs. It seems to have become 
naturalized in the Northwest, having been found in Washington 
(Pullman, 1900, Piper), Oregon (Wallowa Mountains, 1897, 
Sheldon 8846), and Idaho (Ketchum, 1911, Nelson & Macbride). 
ATRIPLEX L., 
ATRIPLEX HASTATA L. Sp. Pl. 1053. 1753 
Chenopodium subspicatum Nutt. Gen. 1: 199. 1818. a 
Atriplex lapathifolia Rydb. Mem. N. Y. Bot. Gard. 1: 133. 1900. 
Atriplex carnosa A. Nels. Bot. Gaz. 34: 361. 1902. 
Recent writers upon the botany of the western United States 
have'insisted that the plants of the Rocky Mountain and adjacent 
regions previously referred to A. hastata were distinct from the 
beach or salt marsh plant of the Atlantic and Pacific coasts. 
Their conclusions must have resulted from the paucity of eastern 
material for comparison. In the large series of northeastern 
specimens in the herbarium of the New England Botanical Club 
all the Rocky Mountain forms can be matched without difficulty; 
and it is easy to find European specimens, also, which agree in 
essential characters. In Europe names have been given to all the 
easily recognizable variations, and it would be possible to find 
American plants referable to many of the European forms. ‘These, 
however, are based upon too inconsequential characters to deserve 
attention. 
