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 with dark purple 

 tips : akenes obovate-obloug, below sparsely and toward the summit thickly villous with 

 slender hairs : pappus none, or a few very delicate setiform squamella shorter than the hairs 

 of the akeiie. Proc. Am. Acad. xix. 4. IS. E. California, at Aqua Calieute, in the Mo- 

 have Desert, Parish. 



102. VIGUIERA, HBK. (Dr. A. Viguier, 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 branches, 

 the akenes usually pubescent. --Nov. Gen. & Spec. iv. 224, t. 379; Benth. & 

 Hook. Gen. ii. 375. Viguiera, Leiyhia (Cass.), & HarpaUum (Cass.), in part, 

 DC. Prodr. v. 578-584. 



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

 ceptacle conical: root probably annual or biennial. 



V. helianthoid.es, HBK. Minutely hispidulous-pubescent or scabrous, green, or some- 

 times cinereous : stem 2 to 7 feet high, slender, paiiiculately branched above : leaves alternate 

 or occasionally either upper or lower opposite, slender-petioled, mostly thin, 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-peduncled : involucre only 3 lines high, shorter than the disk, 

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

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

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

 the truncate summit. HBK. 1. c. ; Beuth. & Hook. 1. c. V. helianthoides, Sagraana, laxa, 

 brevipes, and probably V. microcline, tritjuetra, also with little doubt V. dentata (Spreug., the 

 Helianthus dentutus, Cav. Ic. iii. 10, t. 220), DC. Prodr. v. 579. V. Tcxana, Torr. & Gray, 

 Fl. ii. 318. Hellanthella lot (folia, 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. (Mex.) 



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

 -\ Herbaceous to the base from a probably perennial root, not canescent 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 the 

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

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

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

 receptacle gradually acuminate : akenes narrowly ctineate-oblong, almost equalled by the 

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

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

 Schott, Lemmon, &c. (Mex., Schaffher.) 



-f H Shrubby or lignescent at base, low, not tomentosc: leaves hispidulous-scabrous, mostly 

 alternate, rigid. 



V. laciniata, GRAY. Branching: leaves lanceolate or obscurelv hastate, from laciniate- 

 pinnatifid to nearly entire, abruptly petioled, an inch or two long, beneath with very prom- 

 inent pinnate veins: branches bearing several cymosely disposed and pedunculate heads: 

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

 nate : rays half inch long : akenes sparingly pilose, glahrate : pappus-awns chaffy ; the inter- 

 mediate chaffy paleaa laciniate or erose. Bot. Mex. Bound. 89, & Bot. Calif, i. 354. San 

 Diego Co., California, Schott, Newberry, Cleveland, &c. (Lower Calif.) 



