S1NGENESIA. SVl'ElilJLUA. 145 



Tlie rest of this extensive genus of more than 80 spe- 

 cies is pririclpully indigenous to Siberia, the warmer parts 

 of Europe, Persia and tlie Levant; there are also a feu- 

 spec es in Barbary, at the Cape of Good Hope, in India, 

 China and Japan. .1. sericea of the Missouri is also com- 

 mon to Siberia, and ^. biennis to the south of Europe. 



554. BACCHARIS. L. (Groundsel-tree.) 



Calix imbricate, cylindric, soalesevatc^ sub- 

 coriaceous. Feminine florets intcimixed with 

 the hermaphrodite. Receptacle nak^d. Papim'S 

 pilose. 



Shrubb}', rarely herbaceous; flowers often fastigiate, in 

 some species dioicous. — Pappus simple, very long; seed 

 smooth, lO-striate. 



Species. 1. B. anjustifolia. 2. ghmeridiforc. 3. halb 

 r^vfjJia. 



Principally a tropical genus and indigenous to America-, 

 fi. few species exist in India and at tl^e Cape of Good 

 Hope. The large subfjenus Molina, appears to be, with 

 a single exception, peculiar to South America, extending- 

 ai fur as the Siraits of Magellan. 



555. CONYZA. L, (Fiea-bano-) 



Calix imbricated, scales sublinear or ovate, 

 often subscariose. Tiadii none; feminine fiorets 

 marginal, and 3-toothcd, mostly numerous. Re- 

 cr-ptade naked. Rappus simple and capillary, 

 <it' iew rays. 



Herbaceous or shrubby; leaves entire, in a few specie.^ 

 decarrent upon tlie stem; flowers mostly cor3-mb()se or 

 terminally paniculate; rarely spiked — Feminine flowers 

 fertile, hermaphrodite mostly sierile. Seeds smooth or 

 pubescent, minute; pappus rather short, consisting (in the 

 ioUowing species) of from 20 to 30 rays. Scarcely dis- 

 tinct from Gnaphaliiim. 



^ Species. l.C. manjlandicn. Peculiar to salt-marsh'?«;, 

 from Xew York to Carolina. It differs from the following 

 HI being annual, and in having both the calix, and ovate 

 acute leaves pubescent; the form and proportion of the 

 calix js the same; it is also a smaller plant. 2. cajjiphovata. 

 Vii. 3. bffvons. 



4. pucuostadv'cu **' Black Root" of Georgia. Root ^•:- 



