408 COMPOSITE. CJiaptalia. 



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

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

 with leaves in a radical tuft, persistently canesceut 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, VENT. Leaves spatulate or oblanceolate, thickish, entire or retrorsely den- 

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

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

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

 flosculare, Walt. Car. 204. Tussilago integrifolia, Miclix. Fl. ii. 121. Gerbcra 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 hardly bilabiate, of innermost female 

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



C. ntltans, HEMSL. Leaves obovate or oblong, sometimes lyrate-siuuate, 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 pubescent or glabrate, the beak 

 as long as the body. Bot. Biol. Ceutr.-Amer. ii. 255. Tussilago nutans, L. Amcen. Acad. 

 v. 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. Gerbcra 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 

 Thclecarp&a, & 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 

 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 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. 66, 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 ruucinate-piunatifid, 



