CATALOGUE. 179 
reduced to a small lanceolate bract; head 1’ in diameter, calyculate scales 
linear, acute; inner scales (involucre proper) broader, acuminate, and 
somewhat wavy at apex; achenia somewhat cylindrical. 
TETRADYMIA CANESCENS, DC., var. 1NeRMIs, Gray.—Eastern Arizona, at 
6,500 feet altitude, Loew; also from Southern Colorado (449, 855). 
Cyicus Drummonpu, T. & G., (462); and also var. AcaULEScENS, Gray 
(461). _ Colorado. 
Cnicus UNDULATUS, Gray (Proc. Amer. Acad. x, 42).—South of Camp 
Apache, at 5,900 feet (293); and Mount Graham, Arizona, at 9,000 feet 
(742). : 
Var. MEGACEPHALUS, Gray (/. ¢. p. 42)—Head 2-23’ in diameter; 
involucral scales broader than in the type of the species and spines (of 
scales) rather shorter—Camp Apache, Ariz. (256); also elsewhere from 
- Arizona and Utah. 
Cyicus Arizonicus, Gray (JU. ¢. p. 44). (Cirsium undulatum var., Gray, 
Pl. Wright. 2, p. 101.)—My specimen, a very smooth form, may be briefly 
described thus:—glabrous, 3-4° high, and loosely branched; leaves pin- 
natifid, with the divisions tipped with long spines; peduncles short; scales 
of involucre longer and comparatively narrower from without inward, the 
outermost distinctly spine-tipped (the innermost acute, but hardly spine- 
tipped); ‘‘stigmatic tip to the style barely 4—G6 times longer than thick and the 
node at its base manifest.”—Central Arizona (289); Colorado (463). 
Cnicus Nro-Mexicanvs, Gray (1. ¢. p. 45). (Cirsium Neo-Mericanum, 
Gray, Pl. Wright. 2, p. 101.)—1-2° high, covered with a dense, soft, white 
wool (becoming less so with age); lower leaves petioled, deeply pinnately 
parted, the lobes tipped with well-marked spines, with margins between 
spiny-ciliate; upper leaves sessile, less deeply pinnatifid and smaller, 
becoming gradually reduced to bracts; heads hemispherical, 1-2’ in diam- 
eter; outer scales of the involucre reflexed, and with tips more strongly 
spinescent than the inner ones; corolla somewhat irregularly cleft; lobes 
twice as long as the throat; anthers with a minute spiny tip, longer than 
each anther is wide—Santa Fé, N. Mex. (62). 
Crcus Parry, Gray (i. c. p. 47).—Greenish, or even somewhat 
glaucous, slightly tomentose ; leaves lanceolate, irregularly, deeply dentate, 
