STANDLEY: CHENOPODIACEAE 413 
As a result an almost endless number of forms have been described 
and named. Many of these minor forms occur in North America, 
and any one who is interested in their segregation could find here 
an almost unlimited field for investigation. To the writer, how- 
ever, most of the forms recognized abroad seem to be based upon 
such slight and inconstant characters that they scarcely deserve 
serious consideration, especially in America, where the flora as a 
whole is still so imperfectly known. 
In Europe, too, many presumed hybrids have been described, 
not only hybrids between species but even between hybrids. 
Most of these are known only from cultivated plants. If hybridi- 
zation is a common phenomenon in the genus it may well explain, 
partially at least, the obstacles to the determination of specific 
limits. It is unfortunately true that the North American species 
are still but poorly understood, and that a wholly satisfactory 
arrangement of them is apparently not to be secured at present. 
CHENOPODIUM PALLESCENS Standley, N. Amer. Fl. 21: 15. 1916 
The plants referred to this species have passed as C. leptophyllum 
Nutt. and C. subglabrum (S. Wats.) A. Nels. They are most like 
the latter species in pubescence and habit, but are distinguished 
from both by having the pericarp firmly attached to the seed. 
The. following specimens have been seen: 
Missourt: Allenton, on stony hills, August 30, 1887, Eggert; 
near Pacific, Eggert; Webb City, E. J. Palmer 1041; Sheffield, 
Bush 553. OKLAHOMA: Lincoln County, 1895, Blankinship; 
Sapulpa, Bush 489. Texas: Dallas County, Reverchon 818. 
New Mexico: Roswell, Earle 326 (type). 
CHENOPODIUM INAMOENUM Standley, N. Amer. FI. 21: 15. 1916 
Although closely related to C. leptophyllum, which it resembles 
in general appearance, this species has the pericarp adherent to 
the seed, instead of free. It has a wide range, as phew by the 
- following list of specimens examined. 
OrEGON: P Ranch, Griffiths & Hunter aie Montana: Horr, 
Mearns 3318. Wyominc: Bitter Creek, Sweetwater’ County, 
A. Nelson 3704a. Utau: Henry Mountains, Jones 569501. 
Nevapa: Ely, A. E. Hitchcock 1237. Arizona: Nagle’s Ranch, 
