408 COMPOSIT.E, aiaptalia. 



204. CHAPTALIA, Vent. (/. A. 0. Ohaptal, an eminent chemist.) — 

 Perennial herbs (all American), chiefly stemless, low, and floccose-tomentose ; 

 with leaves in a radical tuft, persistently canescent beneath, glabrate above ; scapes 

 naked ; heads at first nodding ; flowers white or purplish, or the rays rose-purple : 

 fl. spring and summer. 



§ 1. Akenes of female flowers merely attenuate into a neck; those of her- 

 maphrodite flowers all abortive : scapes elongated. — • Ghaptalia, DC. 

 C. tomentosa, Vent. Leaves spatulate or oblanceolate, tliickish, entire or retrorsely den- 

 ticulate, white beneath with dense matted tomentum : scapes a span to a foot liigli : rays 

 broadly linear, commonly purple : akenes glabrous. — Hort. Cels. t. 61 ; Tursh, Fl. ii. 577 ; 

 Sim.% Bot. Mag. t. 2257 ; DC. Prodr. vii. 41 ; Torr. & Gray, Fl. ii. 464. Perdlcium semi- 

 floscidare, Walt. Car. 204. Tussilago integrifolia, Michx. Fl. ii. 121. Gerhem Walieri, 

 Schultz Bip. in Seem. Bot. Herald, 313. — Moist pine barrens, N. Carolina to Florida and 

 E. Texas. 



§ 2. Akenes of all the flowers fertile, and with slender usually filiform beak : 

 corollas of hermaphrodite flowers sometimes hardly bilabiate, of innermost female 

 flowers somewhat so : scapes elongated. — Leria, DC. 



C. nutans, I-Iemsl. Leaves obovate or oblong, sometimes lyrate-sinuate, thin, beneath 

 white Nvith more cottony or even arachnoid and partly deciduous tomentum : scapes a foot 

 or two liiL;h : rays small and narrow, little exserted : akenes pubescent or ylabrate, the beak 

 as lon(,' as the body. — Bot. Biol. Centr.-Amer. ii. 255. Tu&^ilacjo nutans, L. Amoen. Acad. 

 T. 406" (Plum. ed.Burm. t. 41, f. 1). Leria li/rata, Cass. Diet. xxvi. 102. L. nutans, DC. 

 Ann. Mus. Par. xix. 68, & Prodr. 1. c. 42. Gerbera nutans, Schultz Bip. 1. c. — Wooded 

 grounds, Texas to Kew Mexico and Arizona. (Mex., W. Ind., S. Am.) 



205. PERifiZIA, Lag. {Lorenzo Perez, of Toledo, pharmacist and writer 

 on materia medica in the sixteenth century.) — Perennial herbs, all American 

 (Texan, Californian, and southward, chiefly along the Andes), not lanate, except 

 at the base of the stem, mostly with reticulated leaves, often setulose-ciliate or 

 spinulose ; heads solitary or cymose or paniculate ; the corollas rose-purple to 

 white, rarely blue, never yellow. — Amoen. Xat. i. 31 ; Gray, PI. F'endl. 110, & 

 PI, Wright, i. 126; Benth. & Hook. Gen. ii. 500. Perezia, Clarionea (Lag. 

 ined.), Homoianthus, Dumerilla (Less., not Lag., nor DC. Ann. Mus.), Proustia 

 § Tkelecarpcea, & Acourtia (Don), DC. Prodr., &c. Brosia, Cass. — § Euperezia 

 (Perezia, Lag. 1. c, Clarionea & Ifomoiaiif/ms, DC), of S. American species, is 

 distinguished by radiate head.s, the corollas of marginal flowers haviug elongated 

 and conspicuously liguliform outer lip, the two lobes of the inner much shorter 

 and smaller. 



§ Acourtia, Gray, Proc. Am. Acad. xix. 58, has flowers nearly or quite 

 homomorphous, the marginal corollas with 3-toothed outer lip hardly ever longer 

 than the two lobes of the inner : flowers commonly fragrant : involucre usually 

 naked at base : leaves coriaceous or papyraceou.s, reticulated : usually a tuft of 

 wool at base of the stem. — Acourtia, Don in Trans. Linn. Soc. xvi. 203; DC. 

 Prodr. vii. 05. Perezla, Llav. & Lex.; Less.; DC. 1. c. 62. PumeriUa, Less. 

 & DC. 1. c. 66, not Lag., nor Cass. Of few Chilian, numerous JMi'xican, and the 

 following Texano-Californian species. 



* A span or two high : heads (half-inch to inch long) single or few, 20-30-fliiwoi-cd : fluwers purple. 

 P. runcinata, LAii. Acaulesccnt, .scabrou.s-pubcrulont or glabralo; rootstocks app.arently 



sjiort, sending down tuberous-thickened fascicled roots : radical leaves ruuciuate-piiuiatifid, 



