124 COMPOSITE. Chrysopsis. 



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

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

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



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

 vii. 66, & Trans. Am. Phil. Soc. 1. t. (§ Phyllopappns) ; Torr. & Gray, 1. c, § Achi/raia.— 

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



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

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

 involucre thinner and more scarious. — Proc. Am. Acad. vi. oi'S. Ammodia, 

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



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

 late, sometimes hirsute or almost hispid ; midrib conspicuous : involucre nearly equalliug 



. the flowers; its bracts pluriseriate : corollas slender: akenes oblong. — Proc. Am. Acad. 

 1. c. & Bot. Calif, i. 309. Ammodia Oregana, Nutt. 1. c. ; Torr. Bot. Wilkes Exped. t. 9, A. 

 Biickeltia Cumingii, Klatt, in Abb. Nat. Gesells. Halle, xv. 5. — Sandy or gravelly banks of 

 streams, Oregon and W. California. 



Var. scaberrima. Leaves (of branches) small, these and the branches very hispid 

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

 ' C. Bre"weri, 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 ojjen woods, first coll. by Brewer. 



28. ACAMPTOPAPPUS, Gray. ("AKa/x-Trro?, unbending or stiff, and 

 TrctTTTToj, pappus.) — Low shrubs, of the Arizona-Nevadan desert region, n foot to 

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

 small, entire, sessile, nearly veinless except midrib, lower spatulate, upper linear- 

 oblong to linear : heads terminating pedunculiform 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) spluero- 

 cephalus. Gray, PI. Fendl. 76; Torr. in I'acif. R. Eep. vii. t. 6. — 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 C'audelaria, Esmeralda Co., TT. S. Shoekley. 



29. XANTHlSMA, DC. (■S.aveio-p.a, dyed yellow, alluding to the bright 

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

 ii. 2.13. Ce?itauridium, Torr. & Gray, Fl. ii. 246. — Single species, near to 

 Aplopappus, showy in cultivation. 



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

 branches terminated mostly by solitary large heads : lea\cs from narrowly oblong to lanceo- 

 late ; radical and lower cauline not rarely laciuiate-]iinnntifld and even liipinnately parted; 

 c.auline sessile, sparsely serrate or denticulate, or the upper entire, outer bracts of the 

 involucre commonly narrowed below the green body .ir apprjidage ; this whitish-margined, 

 and sometimes with rounded barely iniicronate summit, oftener either gradnallv or abrui)tly 

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

 short tube, and the style sliort. — Gray, PI. Wright, i. 98 (v;u-. lirrfandieri, with rounded 

 obtuse involucral bracts, and var. Drummondii, A\ith pointed ones) ; Torr. Bot. Marrv Hep. 



