SOME WESTERN POLEMONIACES. 301 
2. M. mumis. Collomia humilis, Dougl. in Hook. FI. ii. 
76, probably. The mere name humilis may, in this case, be 
considered sufficiently diagnostic; for, in the region whence 
these were derived M. gracilis is a tall plant, commonly 10 
or 12 inches high, and not widely branching, while this 
other is low, branched from the very base, and that so dif- 
fusely, that the plant as a whole is broader than high, the 
height seldom one-third that of M. gracilis. The same 
glandular pubescence marks this and M. gracilis alike; but 
the calyx is shorter, and the capsule less elongated, even 
almost globose, in M. humilis; while a still more notable 
difference between the two lies in relative length of pedicels 
in the geminate flowers. In M. gracilis the longer pedicel 
is of barely twice the length of the short one, reaching only 
as high as the middle of the calyx of the subsessile flower. 
In M. humilis the long pedicel is four or five times longer 
than the short one, bearing its calyx conspicuously above 
the tips of the segments of the subsessile calyx. Mr. Leiberg 
records the fact that where these two species grow together, 
on gravelly hills, at the south end of Lake Pend d Oreille, 
this small species is in flower two weeks earlier than the 
other. Mr. Piper has sent me what appears to be good M. 
humilis from Spokane (n. 2291), and also from the Palouse 
Hills, near Pullman (n. 1518), both under the name of “ Gilia 
aristella, Gray," an error which seems to intimate the im- 
possibility that a careful field botanist should confuse M. 
humilis and M. gracilis. 
3. M. atABELLA. Near M. humilis, but smaller, more 
slender, less branching, the geminate pedicels quite as un- 
equal, the herbage totally destitute of glandular pubescence 
and glabrous except some scattered ciliate hairs at the base 
of some of the leaves and some short white pubescence on 
the branches: ealyx glabrous and glandless, the subulate- 
linear teeth shorter than the tube: corolla very small, red, 
_ khe tube (white) well exserted. 
