STANDLEY: CHENOPODIACEAE 427 
Coasts of North America and of the West Indies was referred by 
early writers upon American botany to Salicornia fruticosa L. In 
recent years all American botanists, following, apparently, the 
statements made by Watson in 1874,* have recognized the 
American plant as a distinct species under the name S. ambigua 
Michx. The present writer, however, can find no character by 
which to distinguish S$. ambigua from S. perennis, a common 
Old World plant, and the one which formerly passed as S. fru- 
ticosa L. Watson stated that the American plant had pubescent 
seeds and the European glabrous ones, but in making this compari- 
son the European plant he really had in mind was not the Lin- 
naean species, in its proper sense, but a plant now known as 
Arthrocnemum glaucum (Delile) Ung. Sternb. . 
SALICORNIA DEPRESSA Standley, N: Amer. Fl. 21: 85. 1916 
An annual plant of southern California, distinguished from 
S. europaea L., as well as from S. rubra A. Nels., by its elongate, 
prostrate lower branches and small seeds. The following are the 
only collections seen: 
CALIFORNIA: San Diego, 1899, K. Brandegee (type); near the 
Initial Monument, 1898, K. Brandegee; Coronado Sand Spit, 
Chandler 4ort. 
DONDIA Tee 
As treated in the North American F lora, this genus Sectevles 
twenty species, five of eastern North America, the rest western. 
Seven species are described as new, three of them known only 
from Mexico or from barely outside that country. The species 
of this genus are difficult of determination, and a greater amiount 
of herbarium material, as well as more extensive study in the field, 
will be necessary to obtain a wholly satisfactory treatment of them, 
if, indeed, such a treatment is possible. The species described as 
new seem to the writer to be based upon important differences; 
certainly they are fully as well marked as most of those heretofore 
recognized. 
DonpIA DEPRESSA (Pursh) Britton; Britt. & Brown, Ill. Fl. 1: 585. 
1896 ; 
There seem to be no definite characters by which to separate 
from this D. calceoliformis (Hook.) Rydb. and D. erecta (S. Wats.) 
* Proc. Amer. Acad. 9: 125. 1874. 
