Gymnolomia. COMPOSIT,E. 2G0 



long: akenes acutely angled and with few or obscure intermediate nerves, very smootli, the 

 3 or 4 angles extended into a paiipus of as many short and blunt teeth, which are barely 

 corouiform-confluent at base. — Lond. Jour. Bot. vi. 245 : Grav in Pacif. R. Rep. iv. 102, & 

 Pruc. Am. Acdd. viii. 65.5.— S. Colorado and New Mexico to Utah and Wyoming, Ceyer, 

 Bi'jtl'jir, Pairj, ]]'ard, &c. 



101. GYMNOLOMIA, HBK. (Fv/xvor, naked, XCj/xa, border, the pappus 

 obsolete or none.) — Herbs or frutescent plants (of ^Mexico and adjacent coun- 

 tries), resembling the smaller-flowered species of Helianthus ; with erect branch- 

 ing stems, alternate or opposite leaves, and heads of yellow flowers (or the disk 

 brownish) ; the peduncles terminating the branches: fl. summer. — Nov. Gen. & 

 Spec. iv. 217, t. .373,374; Benth. & Hook. Gen. ii. oG.j. Gymnopsis, DC. 

 Prodr. V. 501, in part. 



* Annuals : receptacle of the head conical and the disk high: bracts of the rather fimple involucre 

 linear. — Ildliumtrh, Xutt. 



G. Porteri, Gkat. a foot or two high, slender, paniculately branched, sparingly hispid, 

 otherwii-e nearly glabrous : leaves nearly all alternate, narrowly lanceolate or linear, entire : 

 rays 5 to 8, oval or obovate (half-inch or more long), deep orange yellow : disk in age oblong- 

 conical; its chaffy bracts oblong-lanceolate or the outer ovate, cuspidate-acuminate, striate, 

 merely concave at maturity : fructiferous receptacle almost columnar : akenes turgid-obovate, 

 very obscurely quadrangular, dull, somewhat puberulent, with small terminal areola, one of 

 the angles or nerv-es sometimes slightly margined or umbonate at the summit : style-tips 

 subulate and hLspid. — Proc. Am. Acad. xii. 59 ; Meehan, Xat. Flowers, ser. 2, ii. t. .35. — Rud- 

 bechia ? Piu-Uri, Gray, PI. Fendl. 8-3. — Northern Georgia, known only on the isolated granite 

 rock called fStone Mountain, near Atlanta, where it abounds ; first coU. by Prof. Porter. 

 -Gr. multiflora, Benth. & Hook. A foot to a yard high, strigulose-pubescent or scabrous, 

 sometimes aL-o hi.spid, often much branched : leaves from narrowly linear to lanceolate, 

 rarely broader, either alternate or mainly opposite, entire or oliscurely denticulate : rays 

 10 to 15, golden yellow: di.sk hemispherical, in age little more elevated and receptacle ob- 

 tusel\- conical; its bracts obtuse or the inner acute with soft acnmination : akenes smooth, 

 compressed, with convex or obtusely angulate sides : style-tips sliort and obtnse. — Benth. & 

 Hook, ex Eothrock in Wheeler Eep. vi. 160, & Herasl. Biol. Centr.-Am. ii. 162. Hdiomeris 

 muitlflora, Xutt. 1. c. ; Gray, PI. Fendl., PI. Wright, ii. 87, ^^ ith var. hispida, &c. — Sandy 

 banks of streams, &c., W. Texas to Wyoming, Nevada, and Arizona. A'ery polymorphous : 

 the root not perennial as was supposed. An indigenous specimen coll. by Lemmon in Arizona 

 has disk-corollas all converted into rays or radiatiform anipliate lobes. (.Mex.) 



G. triloba, Gray. JIuch branched, over 2 feet high (root not seen), obscurely puberulent, 

 no hispid bristles : leaves roundish in general outline, 3-lobed, with subcordate or truncate 

 base, short-petioled, the lobes short and broad: rays 12 or more, oblong-linear, elongated: 

 disk hemispherical : receptacle low-conical : akenes of the preceding but more oblong. — 

 Proc. Am. Acad. xvii. 217. — Mountains of S. Arizona south of Rucker's A'aHey, Lemmon. 

 * # Perennial or frutescent : disk and receptacle low. 



G. tenuif61ia, Besth. & Hook. Shrulibv, much branched, 2 or 3 feet high, scabrous- 

 puberulent, verv leafy : branches terminated by solitary long-peduncled heads : leaves alter- 

 nate and the lower opposite, canescent beneath, pinnately or pedately parted into 3 to 7 

 narrow Unear lobes, or the uppermost verv narrow and entire, the margins mostly revolute : 

 bracts of the involucre subulate-linear: rays 10 to 16: disk convex: chaffy bracts of the 

 receptacle truncate-ol^tuse : akenes smooth, quadrangular-compressed. — Ex Hemsl. Biol. 

 Centr.-Am. 1. c. Beliomerls ienuifo'ia. Gray, PI. Fendl. 84, PI. Wright, &c. — 8. W. Texas, 

 Wright, Havard. (Adj. Mex., Berlandier, Gregg, &c.) 



* * * Annual: receptacle and disk barely convex: habit of i:nceiia and JfZwn/AtM. 



G encelioldes, Gray, a foot or two high from an annual root, strigose-canescent and 

 the branching .stem hispid : leaves ovate-oblong or obscurely deltoid, rather obtnse, nearly 

 entire, mostly long-petioled, the lower opposite : heads barely half-inch high : involucre bi- 

 serial'; outer bracts all equal and equalling the disk, oblong-lanceolate, acute, white with soft 



