408 COMPOSITiE. Chaptalia. 



204. CHAPTALIA, Vent. (J. A. C. Ckaptal, an eminent chemist.) — 

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

 with leaves in a radical tuft, i^ersistently 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. — Chaptalia, DC. 



C. tomentosa, Yext. Leaves spatulate or oblanceolate, thickish, entire or retrorscly den- 

 ticulate, white beneath witli dense matted tonientum : scapes a span to a foot liigh : rays 

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

 Sims, Bot. Mag. t. 2257 ; DC. Prodr. vii. 41 ; Torr. & Gray, Fl. ii. 464. Perdicium semi- 

 Jlosculare, Walt. Car. 204. Tussilatjo intcijrifolia, Michx. Fl. ii. 121. Gerbern Walteri, 

 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 hai'dly bilabiate, of innermost female 

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



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

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

 or two high : rays small and narrow, little exserted : akenes jDubesceut or glabrate, the beak 

 as long as the body. — Bot. Biol. Centr.-Amer. ii. 255. Tussilago nutans, L. Amoin. Acad. 

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

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

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



205. PEREZIA, 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. Nat. i. 31 ; Gray, PI. Fendl. 110, & 

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

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

 § Thehcarpcea, & Acourtia (Don), DC. Prodr., &c. Drosia, Cass. — § Euperezia 

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

 distinguished by radiate heads, the corollas of marginal flowers having 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 

 homomori)hous, the marginal corollas with o-toothed outer lip hardly ever longer 

 than tlie two lobes of the inner : flowers commonly fragrant : involucre usuallj^ 

 naked at base : leaves coriaceous or papyraceous, reticulated : usually a tuft of 

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

 Prodr. vii. Go. Perezia, Llav. & Lex. ; Less. ; DC. 1. c. 62. Dumerilia, Less. 

 & DC. 1. c. 6G, not Lag., nor Cass. Of few Chilian, numerous Mexican, and the 

 following Texano-Californian species. 



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

 P. runcinata, Lag. Acaulescent, scabrous-puberulent or glabrate; rootstocks apparently 



short, sending down tuberous-thickened fascicled roots : radical leaves ruuciuate-pinnatifid, 



