270 COMPOSITE. Viguiera. 



but at length hispid pubescence, longer and larger than the nearly linear interior ones : rays 

 10 or 12, oval, showy, golden yellow, less than an inch long: disk-corollas wich dark purple 

 tips r akenes obovate-oblong, below sparsely and toward the summit thickly villous with 

 slender hairs : pappus none, or a few very delicate setiforra sguaraellte sliorter than the hairs 

 of the akene. — Proc. Am. Acad. xix. 4. — S. E. California, at Aqua Calieute, iu the Mo- 

 have Desert, Parish. 



102. VIG-UIlfiBA, HBK. {Dr. A. n^rm'er, botanist, of Montpellier.) — 

 Herbaceous or sometimes suffruticose plants (of the warm parts of America) ; 

 with only the lower or rarely all the leaves opposite, yellow-flowered heads of 

 only medium size (in our species), on peduncles at the summit of the brandies, 

 the akenes usually pubescent. — Nov. Gen. & Spec. iv. 224, t. 37'J ; Benth. & 

 Hook. Gen. ii. 37o. Viguiera, Leighia (Cass.), & Harpalium (Cass.), in part, 

 DC. Prodr. V. 57.'5-584. 



* Disk of the head at maturity elevated or strongly convex (but at flis' often low) and the re- 

 ceptacle conical: root probably annual or biennial. 

 -"V. helianthoides, HBK. Minutely hispidulous-pubescent or scabrous, green, or some- 

 times cinereous : stem 2 to 7 feet high, slender, paniculately branched above : ]ea\'es alternate 

 or occasionally either upper or lower opposite, slender-petioled, mostly thiu, ovate, acuminate, 

 sometimes very broadly ovate (the larger 4 to 6 inches long and .3 or 4 wide), sometimes 

 ovate-lanceolate, from slightly to coarsely serrate, triplinerved from near the base : heads 

 paniculate, usually slender-ped uncled: involucre only 3 lines high, shorter than the disk, 

 nearly simple, of subulate or linear bracts : raj-s 7 to 10, obovate or oblong, over half-inch 

 long : chaffy bracts of the receptacle somewhat cuspidately mucronate or acuminate : akenes 

 villous-pubescent : pjile^e a pair on each side between the chaffy awns, erose or fimbriolate at 

 the truncate summit. — HBK. 1. c. ; Benth. & Hook. 1. c. V. heJiantJwidex, Saijrmana, laxa, 

 brevipes, and probably V. microcUne, tnguetra, also with little doubt T'. dentata (Spreng., the 

 Ihlianthus dentatus, Cav. Ic. iii. 10, t. 220), DC. Prodr. v. 579. V. Texana, Torr. & Gray, 

 ri. ii. 318. Hellanthella latijblia, Scheele in Linn. xxii. 160. — Shady or more open grounds, 

 Texas to Arizona. (Mex., Cuba.) 

 V. canescens, DC. Less tall, more rigid, commonly cinereous : leaves coriaceous, entire 

 or nearly so, from broadly ovate to oblong-lanceolate ; the lower opposite : chaff of the 

 receptacle more cuspidate: rays saffron-yellow: akenes canescently sericeous. — Prodr. v. 

 579. — S. Arizona, Pringle, a greener form, and in adjacent Mexico, Palmer. ( Jfex.) 



#• * Disk flattish or convex: receptacle at maturity flat or hardly conical. 

 -I- Herbaceous to the base from a probably perennial root, not canesceut nor tomentoee. 

 ' V. cordifolia, Gray. Hispid or hispidulous and scabrous : stem rather stout, 2 or 3 feet 

 high, leafy to the top, commonly branched above : leaves mostly all opposite, occasionally 

 some alternate, subcordate-ovate or deltoid, acute, serrate or denticulate, 3-ribbed from tlie 

 base, either sessile or short-petioled, rough ; veinlets reticulated : heads mostly corymbose 

 and short-peduncled : involucre campanulate, fully half-incli long, equalling the barely con- 

 vex di.sk, commonly lanceolate and acuminate, erect, in 2 or 3 series : chaffy bracts of the 

 receptacle graduidly acuminate: akenes narrowly cuneate-oblong, almost e'quallcil by tlie 

 chaffy awns ; the intermediate palea: equalling the breadth of the akene, narrowly oblong, 

 rigid. — PI. Wright, i. 107, ii. 88. — Near water-courses, W. Texas to Arizona^ Wrujht, 

 Schott, Li'iiniion, &c. (Mex., Schaffner.) 



H— -1- Shrubby or lignescent at base, low, not tomentose : leaves hispiduhuis-scabrous, mostly 

 alternate, rigid. 



V. laciniata, Gray. Branching : leaves lanceolate or obscurely hastate, from laciniate- 

 ]iiunatilid to nearly entire, abruptly petioled, an inch or two long, beneatli with \evy prom- 

 inent pinnate veins: branches l>caring several cymoscly disi.osed and pedunculate heads: 

 involucre nearly half-inch high; its bracts lanceolate or the outermost ovate, acute or acumi- 

 nate: rays half inch long : akenes sparingly pilose, glabrate : papims-awiis cliaffy : the inter- 

 mediate chaffy pakuc lacinialc or erose. — But. Mex. Bounil. 89, & Bot. Calif, i. 354. — San 

 Diego Co , California, Schott, Ncwhriry, Clecelaiid, &c. (Lower Calif.) 



