STNGENESIA. SrPERFLXJA. 145 



The rest of this extensive genus of more than 80 spc 

 cies is principally indigenous to Siberia, the warmer parts 

 of Europe, Persia and the Levant; there are also a few 

 species in Barbary, at the Cape of Good Hope, in India, 

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

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



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

 Calix imbricate, cylindric, scales ovate, sub- 

 coriaceous. Feminine florets intermixed with 

 the hermaphrodite. Receptacle naked. Fappns 

 pilose. 



Shrubby, rarely herbaceous; flowers often fastiglate, in 

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

 smooth, lO-striate. 



Species. 1. B. angustifoUa. '2. glomeimlijlora. 3. hall" 

 mi folia. 



Principally a tropical genus and indigenous to America; 

 a few species exist in Tndia and at the Cape of Good 

 Hope. The large subgenus Molixa, appears to be, with 

 a single exception, peculiar to South America, extending 

 as far as the Straits of Magellan, 



555. CONYZA. L. (Flea-bant\) 



Calix imbricated, scales sublinear or ovate, 

 often subscariose. Uadii none; feminine florets 

 marginal, and 3 toothed, mosth numerous. Re- 

 ceptacle naked. Pappus simple and capillary, 

 of few rays. 



Herbaceous or shruTiby; leaves entire, in a few species 

 decurrent upon tlvc stem; flowers mostly corymbose ot 

 ■terminally paniculate; rarely spiked — Feminine flowers 

 fertile, hermaphrociite mostly sterile. Seeds smooth or 

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

 I'jllov/ing species) of from 20 to 30 rays. Scarcely dis- 

 tinct from Gnaphalitan. 



Species. l.C mcovlandica. Peculiar to salt-marshef?, 

 from New York to Carolina. It differs from the following 

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

 acute leaves pubescent; tiie form and proportion of the 

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

 Ph. 3 /.>/fron<!, 



4 pijcnostac/ii'a. "Black Root" of Georgia. Root tu- 

 vol... II N 



