✓ 
obsolete on each carpel : oil-tul)es 
carpophore free. 
ft on the coinniissural side: 
“Plains of the Platte, near the Rocky Mountains” {Ntiftall). 
In the type specimens of this uncertain species the fruit, upon which 
its specific rank chiefly depends, has disappeared. It closely resembles 
low forms of C. glomerafus, but differs from that species in its free per- 
sistent carpophore, small involucel bractlets, and few rays, besides the re- 
markable fruit characters described by Nuttaii. Specimens collected by 
E. L. Greene, in 1870, on the plains near Denver, Colorado, and by Prof. 
T. 0. Porter, in 1871, near Cheyenne, Wyoming Territory, all in flower, 
have been referred to this species, correctly so, it may be. However, they 
are somewhat larger, the bractlets ai*e lai'ger, though much smaller than in 
C. glomeratus, and there is an elongated subterranean caudex from a deep- 
seated fusiform root. Mature fruit alone can certainly determine the rela- 
tionship. 
— Oil-tubes solitary ifi the intervals (not known in C. 
nivalis). 
3. C. globosus Watson, Proc. Am. Acad. xi. 141. With 
a very short stem bearing a few leaves and peduncles (2 to 4 
inches high), glabrous: leaves glaucous, pinnate or bipinnate with 
broadly oblong pinnatifid segments; ultimate divisions oblong, 
entire o. toothed, often cuspidate: rays and pedicels obsolete, the 
flowers and fruit being in dense globose heads, and the invojucel- 
bractlets very much reduced or wanting: fruit 3 to 4 lines long. 
the 5 thickish carpel wings approximately equal, becoming nar- 
rower towards the base of the fruit: oil-tubes 2 on the commissural 
side, and a small one in each wing. (Fig. 18.) — C.montanus 
Ton*. & Gray, Pac. R. Rep. ii. 120; Watson, King’s Rep. v. 123, 
in part. C. montanus., var. ylohosus Watson, 1. c. 124, excl. fruit. 
Northern Nevada, near Carson City (Stretch, Watson), in the Goshoot 
mountains {Beckirith), near Empire City (Jones), nenv Pyramid Lake 
(Lemmon). Ft. May and June. 
4. C. corrugatus Jones, Am. Nat. 1883, 973. Like the 
preceding species, but leaves simpler, with broader more obtusely- 
toothed segments: rays 1 to (> lines long; involucels very variable, 
of larofe or small oblono; or lanceobte bractlets more or less 
O C!) 
united: fruit (immature) apparently identical in section, tbe young 
wings very much wrinkled. 
Nevada, in the region of Humboldt Lake, June, 1882 (Jones :588(i). 
Jones from Juab and Sioux Bridge, Utah, distributed as C. Fendleri, 
