Gymnolomia. COMPOSIT.E. 269 



long : akenes acntel_y angled and with few or obscure intermediate nerves, very smooth, the 

 3 or 4 angles extended into a pa]>pus of as many short and blunt teeth, which are barely 

 coroniform-confiuent at base. — Loud. Jour. Bot. vi. 245; Gray in Pacif. R. Kep. iv. 102, & 

 Proc. Am. Acad. viii. 655. — S. Colorado and New Mexico to Utah aud Wyoming, Geyer, 

 Biijclow, Parry, Wttrd, &c. 



101. G-YMNOLCMIA, HBK. (Tvixv6r, naked, Xwfia, 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 

 bi'ownish) ; the peduncles terminating the branches : fl. summer. — Nov. Gen, & 

 Spec. iv. 217, t. 373, 374; Benth. & Hook. Gen. ii. 3G3. Gymnopsis, DC. 

 Prodr. V. 561, in part. 



* Annuals: receptacle of the head conical and the disk higli : bracts of the rather simple involucre 

 linear. — Ihliomerh, Nutt. 



G. Porteri, Gray. A foot or two high, .slender, paniculately branched, sparingly hispid, 

 otherwise 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 cliaffy bracts oblong-lanceolate or the outer ovate, cuspidate-acuminate, striate, 

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

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

 the angles or nerves sometimes slightly margined or umbonate at the summit : style-tips . 

 subulate and hispid. — Proc. Am. Acad. xii. 59 ; Meehan, Nat. Flowers, ser. 2, ii. t. 35. — Rnd- 

 beckia ? Porteri, Gray, PI. Fendl. 83. — Northern Georgia, known only on the isolated granite 

 rock called Stone Mountain, near Atl^mta, Avhere it abounds ; first coll. by Prof. Porter. 



G. multiflora, Bexth. & Hook. A foot to a yard high, strigulose-pubesceut or scabrous, 

 sometimes also hispid, often much branched : leaves fi-om narrowly linear to lanceolate, 

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

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

 tusely conical; its bracts obtuse or the iimer acute with soft acumination : akenes smooth, 

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

 Hook, ex Rothrock in AVheelcr Pep. vi. IGO, & Hemsl. Biol. Centr.-Am. ii. 162. Heliomeris 

 viuhljlnra, Nutt. I.e.; Gray, PI. Fendl., PI. "Wright, ii. 87, with var. A/s/^V/a, &c. — Sandy 

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

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

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



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

 no his])id bristles : leaves roundisli in general outline, 3-lobed, witli 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 Backer's Valley, Letninon. 



* * Perennial or frutescent: disk and receptacle low. 



G. tenuif61ia, Bkntii. & Hook. Shrubby, much branched, 2 or 3 feet high, scabrous- 

 puberulent, very 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 linear lobes, or the uppermost very narrow and entire, the margins mostly revolute : 

 bracts of the involucre subulate-linear: raj's 10 to 16: disk convex: chaffy bracts of the 

 receptacle truncate-obtuse: akenes smooth, quadrangular-compressed. — Kx Hemsl. Biol. 

 Centr.-Am. 1. c. Heliomeris tennifolia. Gray, PI. Fendl. 84, PI. Wright, &c.— S. W. Texas, 

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



* * * Annual: receptacle and disk barelj' convex: h&\i\t oi Encelia &nA Hdianlhus. 



G. encelioides, Gray. A foot or two high from an annual root, strigose-canescent and 

 the branching stem hispid: leaves ovate-oblong or obscurely deltoid, rather obtuse, 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 Avith soft 



