136 SYNGENESIA. -l^qUALIS. 



This extensive pfeiuis of near 80 species is almost pecu- 

 litirly An.-.rlcan, extending- beyond ihe tropics as lar as 

 I'cru and Paraguay. In FAirojje there is but a sinijle spe- 

 cies with 3-paned leaves, I in Ciiina, 2 in Japan, 3 at the 

 Cape of Good Hope, 1 in Guinea, anclhtr at Mozambi- 

 que, 1 in S;,ria, and 2 of doubtful get. us in Australasia. 



543. MJKANIA. mildenow. 



Calix 4 Of 6-Ica\ed, equal. 4 or 6-i]o\\ ercd. 

 Beceptacle naked. Pappus pilose. 



A crenus scarcely distinct from EiipatGviinn. Stems twi- 

 ning- or erect. Leaves opposite, ovate, cordate or hastate; 

 flowe.s corymbose or spiked, cor\ nibs panicidate, axillary, 

 or termir; il. Flower and seed as in Eiipaioriiim. 



Spfcies. 1. M. scandens. Flowers in some plants 

 fra^-ant, 2. * pubescens. Stem twining' pubescent, leaves 

 cordate and acum.nate, ang-ularly toothed, and on eilhev 

 side-, as M-el'i as the calix, pubescent, lobet* divaricate, 

 eq ;al. Hab. In Carolina and Georgia. Flowers pale pur- 

 ple, chlorous. Ven nearly allied to the preceding-. 



A Lerus of 15 spec.es, p.'incipally indig-enous to the tro- 

 pical reg-ions of America, there is also 1 species in India, 

 1 in the Isle of Bourbon, 1 at Sierra Leone, and another at 

 the Cape of Good Hope. 



544. CHRYSOCOMA. Z. (Goldy-Iorks.) 

 Calix imbricated, oblonj^ or hemispherical. 



Shjle scarcely exsoi-ted. Receptacle naked. Pap- 

 pus pilose, scabrous, rays crowded and unequal. 

 Seed pubescent. 



Shrubby or herbaceous; loaves alternate and entire, of- 

 ten narrow; flowevs mostly corymbose and terminal, yel- 

 low, rarely purple; calix .'> or 4, 5, or more than 20-flow. 

 ered, in C. Lino»yris, &c. hemispherical, in all the North 

 American species oblong-, small, and attenuated at the 

 base, the scales are l.kewise rig-id andcarinate. Notwith- 

 standing* this diversity of aspect, the genus appears to be 

 perfectly natural, and presents gradations from one ex- 

 treme to the other. 



Species. 1. C. * graveolens. Shrubby; leaves linear, 3- 

 nerved, smooth and impimctate; branches whitish, pul- 

 vernlently tomentosc; flowers corymbosely fastig-iate and 

 crowded; cahx angular and smooth, 5-flowt:ie(l. Had. 

 On the banks of tiic Missouri in denudaled soils; common, 



