WEST AMERICAN ASPERIFOLLE. 97 
plant than any of the foregoing ; and the great length of the 
main row of prickles is more characteristic, perhaps, than 
the fact that, outside of this definite row, a series of smaller 
aculese is commonly developed from what in other species 
appear as a mere lateral murication or tuberculation. 
Besides having examined the original specimen from 
which the description was drawn for Stevens' Report, I have 
one collected by myself at Laramie, Wyoming, 28 July, 
1889; another is from Prof. Nelson from the same region, this 
representing his entirely synonymous L. cenchroides; and a 
third sheet of the same, though the specimens are smaller, 
was given me by Mr. John Macoun, who collected it in the 
Milk River district of Assiniboia, 7 July, 1895. 
Since Torrey distinctly credits the species to a locality 
within the limits of what is now California, whence, however, 
no specimens have come during all the time that has lapsed 
since 1860, and all our supplementary material is from the 
Rocky Mountain region, one is compelled to believe that the 
collector of Dr. Torrey’s type specimen was in error as to 
his recollection of where he obtained it. 
L. OCCIDENTALIS. Echinospermum Redowskii, var. occiden- 
tale, Wats. Bot. King Exp. 246, in part at least. This is very 
widely dispersed from toward the Rocky Mountains almost 
to the Pacific coast; is well marked among the species here 
defined by its 7 to 11 strongly developed marginal prickles 
usually of triangular-subulate form, lightly or not at all 
connected at base, and, I believe always, grooved or chan- 
neled down the whole inner face; the surface of the nutlet 
being tuberculate, not muricate. 
There is no evidence of the occurrence, anywhere in 
America, of the true L. Redowskit. 
