278 PITTONIA. 
ina region remote and totally different from the Mohave Desert, 
the specimens of which are the only ones he definitely cites in 
his original account of what he at last proposed as a species. 
Twenty years ago I too readily took this only really minute- 
flowered Zschscholtzia of the Mohave to be typical of Æ. minuti- 
flora. The specimens before me now are, the originals of Mrs. 
Curran’s collecting, mainly preserved in Herb. Calif. Acad., one 
of them having found its way to Herb. Field. Mus., where it 
occupies sheet 148,002. All these originals were taken in June, 
which is very late for that region, and are copiously fruiting, 
the corollas being at their most reduced stage as to size. Plants 
somewhat younger were gathered by Mr. Lemmon, in the same 
region, though on the eastern side of the Colorado, in southern 
Nevada, as early as 1875; yet in these the corollas are little 
larger, and the characters of calyx, stamens, and all else, remain 
the same ; and this is true of a sheet in U. S. Herb. by M. E. 
Jones, taken at Yucca, Ariz., 13 May, 1884. 
Two sheets in U.S. Herb. (nn. 3336 and 3338 by Orcutt,) 
from the Colorado Desert, I place with reluctance under Æ. 
micrantha, They differ somewhat, habitally and as to foliage; 
less different are two Lower Californian specimens in Herb, 
Calif. Acad. by Brandegee, one from Constantia, the other from 
San Enrique. And so Æ. micrantha will be received as a species 
of an extended geographic range through low and arid south- 
western deserts chiefly west of the Rio Colorado and the Gulf of 
California. 
89. E. rortuosa. Annual, a foot high or more, rather slenderly 
branched from the base, the branches at base decumbent, rather 
naked as to foliage, variously curving and tortuous, the whole 
plant glabrous, glaucescent, the stems faintly striate: leaves 
broadly triternate, each main division subtruncate by the nearly 
equal length of the parallel oblong acute segments; the floral 
often reduced to 3 three-lobed or toothed divisions: peduncles 
many, short, very slender: calyx diaphanons, 4 lines long, ovate- 
conic, pointless, or nearly so; corolla orange, 4 inch wide: 
