64 FLOKA OF ST. CROIX AND THE VIRGIN ISLANDS. 



430. E. canadensis, L. 



FI. Juiu'-Xov. liay-flowers often ligulate. Along roads, common. — 

 All islands. 



431. Baccharis Vahlii, DC. (Proil. v, 411) (D. dioica, Valil). 



Fl. all the year round. As much as 30' high. On rocky seashores, 

 gregarious, not uncommon. (The specific name of DC. is to be pre- 

 ferred to that of Vahl, notwithstanding the priority of the latter, for 

 the reasons stated in the Prodronms.) — St. Croix (northwestern coast). 



432. Pluchea odorata, Cass. (v. Sweet Sceut, Ovra bla). 



Fl. Fel).-April. Leaves used as tea agahist colds and as diuretic 

 medicine. In moist localities, not uncommon. — All islands. 



433. P. purpurascens, DC. 



Fl. all the year round. Along rivulets, not uncommon. — St. Croix 

 (Gallows Bay, King.shill Gut). 



434. Pterocaulon virgatum, DC. 



Fl. all tli<' year round. On dry hills, common. — All islands. 



435. Melampodium divaricatum, DC. (Prod, v, f/JO) (J/. jjaZH(/o««wi, Ktb.). 



Fl. Oct.-Feb. Along ditches, gregarious, rare. — St. Croix (Jolly Hill). 



436. Ogiera ruderalis, Oris. 



Virgin Islands (Oris. Fl. p. 309). 



437. Acanthospermura humile, DC. 



Fl. all the year round. Leaves not glandular beneath. A common 

 weed along roads. — St. Thomas. 



438. Xauthium macrocarpum, DC. (Piodr. v, iVi:?) (.Y. oricnlalc, h.). 



Fl. Oet.-Fi'l). A common weed, naturalized around dwi'lUngs. — All 

 islands. 



439. Parthenium Hysterophorus, L. (v. Mnlf-wced, Wlii\e-liead-hrooiii). 



I'l. all the y<>ar round. A very eoinnion weed everywhere. — All islands. 



440. Ambio:ia artcmisiaefolia, T-. ;^) trijiitensis. 



Fl. Sei)t.-( )('t. Naturalized in waste i)laees. — St. Croix (Fredrikssted). 



441. Zinnia niultinora, L. (v. Siiakf-dowcr). 



Fl. Fcb.-Aug. -Vlong roads, not uncommon. — Virgin Islands. 



442. Z. elegans, .h.\fi\. 



FI. ."Nlay-Oct. Naturalized in gardens. — All islands. 



443. Eclipta alb.i, Hassk. 



I'l. .luiic-Feb. In moist localities, not uucoimiioii. — All islands. 



