124 COMPOSITiE. ■ amjsopsis. 



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 tootlied ; the lower sometimes incised : bracts of the 

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

 vii. 66, & Trans. Am. Phil. Soc. 1. c. (§ Phi/l/opappns) ; Torr. & Gray, 1. c, § Achyrcea. — 

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



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

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

 involucre thinner and more scarious. — Proc, Am. Acad. vi. 543. 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 liirsute or almost hispid ; midrib conspicuous : involucre nearly equalling 

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

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

 Brickellia 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. 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 incli or two long) : 

 heads naked-])edunculate : involucre shorter; its bracts fewer-ranked and somewhat broader: 

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

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



28. ACAMPTOPAPPUS, Gray. ('A/ca/xTrros, unbending or stiff, and 

 ■jraTTTTos, pap]ius.) — 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 veinless except midrib, low"er spatulate, upper linear- 

 oblong to linear : heads terminating pedunculiform branchlets, yellow-flowered. 

 ■ — Proc. Am. Acad. viii. G34, xvii. 208. 



A. sphaerocephalus, 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) splucro- 

 cephcdiis, Gray, PL Fendl. 76; Torr. in Pacif. 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 Caudelaria, Esmeralda Co., W. S. S/iockley. 



29. XANTHlSMA, DC. {aavBia-ixa, 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 virgate 

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

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

 cauline sessile, sparsely serrate or denticulate, or the u])per entire ; outer bracts of the 

 involucre commonly narrowed below the green body or appendage ; this whitisli-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 tiilie, and the style short. — Gray, PI. Wright, i. 98 (var. Berlmidieri, with rounded 

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



