222 PITTONIA. 
ish with rose-purple center: calyx of thin texture, the 10- 
nerved tube only half as long as the slenderly subulate not 
rigid nor pungent-pointed teeth: pod equalling the calyx- 
tube, turgid, distinctly stipitate, 2-seeded: seeds very small , 
for the plant, little compressed, green, scarcely dotted. 
Wet meadows and about cold springy places in the moun- 
tain parks of southern Colorado and northern New Mexico; 
also along irrigating ditches among the lower foothills, and 
on the plains, here an immigrant from its native subalpine 
stations. A singularly beautiful member of this most diffi- 
cult group, the perennial involucrate.clovers; but easily 
distinct from the Mexican T. Ortega (T. ànvolucratum,Willd.), 
and from the far northwestern and maritime T. fimbriatum; 
these two being its nearest relatives. 
Trirotium Kine, Wats. This, in so far as the herbaria 
show, is an exceedingly rare species. The one so commonly 
seen in collections under this name is the very different 
T. productum, Greene. The original of Mr. Watson’s T. 
Kingii was obtained away upon the very easternmost limit 
of the geographical range of the species, in the Wahsatch 
Mountains, Utah. Its home is in the meadows of the upper 
Humboldt, in Nevada. Here I have collected it more than 
once; and my specimens are of three or four times the size 
of those of Mr. Watson. "These specimens, like the originals 
are not to be distinguished from T. Beckwithii except by 
their somewhat more elongated heads, and more strongly 
deflexed fruiting pedicels. In characters of foliage and of 
calyx the two species are quitealike. I possess an abnormal 
specimen of T. Kingii from Deeth, Nevada, in which most 
of the leaves are of five large subequal leaflets. 
Trirottum Rypperai. Subspecies of T. longipes, but 
plant twice as large, apparently not forming a turf, but the 
stoutish stems erect, a foot high or more, the stout peduncles 
shorter in proportion: leaflets of lowest leaves oval, the 
others oblong, elliptic and narrowly lanceolate, often nearly 
