124 COMPOSITE. Chrysopsis. 



C. pilosa, Ndtt. a foot or two high, branching : branchlets terminated by solitary middle- 

 sized lieads : pubescence soft-hirsute or villous, also a minute glandulosity : leaves oblong- 

 lanceolate, occasionally denticulate or tootlied ; the lower sometimes incised : bracts of the 

 involucre acuminate, glandular-viscid: rays almost half-inch long. — Joixr. Acad. Philad. 

 vii. 66, & Trans. Am. Phil. Soc. 1. c. (§ Phyllopappns) ; Torr. & Gray, 1. c, § Achynm. — 

 Open pine and oak woods, N. W. Arkansas, W. Louisiana, and Texas, first coll. by Nultall. 



§ 2. Ammodia, Gray. Rays none : outer pappus slender-setulose, inconspicu- 

 ous or obscure: somewhat viscid and pubescent perennials, with bracts of the 

 involucre thinner and more scarious. — Proc. Am. Acad. vi. 54.'3. Ammodia, 

 Nutt. Trans. Am. Phil. Soc. n. ser. vii. 321. 



C. Oregana, Grav. A foot or two high, paniculately branched: leaves oblong or lanceo- 

 late, sometimes hirsute or almost hispi^l ; midrib conspiciious : involucre nearly equalling 

 the flowers; its l)racts pluriseriate : corollas slender: akenes oblong. — Proc. Am. Acad. 

 1. c. & Bot. Calif, i. -309. Ammodia Oregana, Nutt. 1. c. ; Torr. Bot. Wilkes Exped. t. 1), A. 

 Drirkpllia Camiiigii, Klatt, in Abb. Nat. Gesells. Ilalle, xv. .'>. — Sandy or gravelly banks of 

 streams, Oregon and W. California. 



Var. SCaberrima. Leaves (of liranches) small, these and tlie branches very hisjjid 

 scalirous. — Dry creek, Tulare Co., California, Congdon. 



C. Breweri, Gray, 1. c. A foot or more high, more slender, less pubescent or almost gla- 

 brous : leaves shorter, ovate-lanceolate or lanceolate, 3-nerved at base (an inch or two long) : 

 heads naked-pedunculate : involucre shorter ; its bracts fewer-ranked and somewhat broader : 

 corollas funnelform : akenes obovate. — California, in the Sierra Nevada, from 4,500 to 

 11,000 feet, in open woods, first coll. by Brewer. 



28. ACAMPTOPAPPUS, Gray. ("A»ca/x7rros, unbending or stiff, and 

 Tru7nro<;, papjius.) — Low shrubs, of the Arizona-Nevadan desert region, a foot to 

 a yard high, glabrous or obscurely puberulous, not glandular nor resinous : leaves 

 small, entire, seSsile, nearly A'einless except midrib, lower spatulate, upper linear- 

 oblong to linear : heads terminating pedunculii'orm branchlets, yellow-flowered. 

 — Proc. Am. Acad. viii. 634, xvii. 208. 



A. sphserocephalus, Gray, 1. c. Branches striate, corymbosely polycephalous : heads 

 discoid, homogamous, depressed-globular, 4 or 5 lines high : bracts of involucre whitish, 

 outer ones commonly with a pale greenish spot. — Aplopappus {Acamptopappus) spluwo- 

 cephalus, Gray, PI. Pendl. 76 ; Torr. in Pacif. R. Eep. vii. t. G. — Arizona and S. Utah to 

 the Mohave desert in California, first coll. by Coulter. 



A. Shockleyi, Gray-. Branchlets simpler, monocephalous : head hemispherical, radiate: 

 rays 10 to 12, elongated, linear-oblong, bright yellow: outer bracts of involucre more con- 

 spicuously green on the back. — Proc. Am. Acad. xvii. 208. — Mountains of S. W. Nevada, 

 at Candelaria, Esmeralda Co , W. S. Shockley. 



29. XANTHlSMA, DC. (Har^tcr/xa, dyed yellow, alluding to the bright 

 yellow flowers of the showy head.) — Prodr. v. 94; Benth. & Hook. Gen. 

 ii. 253. Centauridium., Torr. & Gray, Fl. ii. 24G. — Single species, near to 

 Aplopappus, showy in cultivation. 



X. Texanum, DC. 1. c. Nearly glabrous, biennial or annual, 1 to 4 feet high, with virgatc 

 branches terminated mostly by solitary large heads : leaves from narrowly oblong to lanceo- 

 late ; radical and lower cauline not rarely laciniate-pinnatifid and even bipinnately parted ; 

 cauline sessile, sparsely serrate or denticulate, or the upper entire : outer bracts of the 

 involucre commonly narrowed below the green body or appendage ; this whitish-margined, 

 and sometimes with rounded barely mucronate summit, oftener either gradually or abruptly 

 acuminate and cuspidate : rays about 20, an inch or less long, the ligule borne on a very 

 short tube, and the style short. — Gray, PI. Wright, i. 98 (var. Berlandicri, with rounded 

 obtuse involucral bracts, and var. Drummondii, with pointed ones); Torr. Bot. Marcy Rep. 



