STNGENESIA, PRUSTRANEA* 181 



the southern hemisphere as far as Peru, with the excep- 

 tion of 2 species of doubtful genus said to be indigenous 

 to Canton in China. 



593. ^ACTINOMERIS.f 



Calix simple, many-leaved, foliaceoiis* subc- 

 qiial. Raijs remote, elongated, (4 to 8). Re- 

 ceptade small and paleaceous, the leaflets em- 

 bracing the margin of the seed. Seed compres- 

 sed and marginated, with the summit persis- 

 tently 2-a\vned. 



Tall and herbaceous plants, with entire, decurrent and 

 alternate scabrous leaves; flowers corymbose, rays yellow, 

 3 or 4 times the length of the calix. — Discal florets like 

 those of Helimithus, and Verhesina, partly ventricose, with 

 a short distinct and narrow tube; stigmas also similarly 

 subulate. Seeds transversely embraced by the leaflets of 

 the receptacle. \ genus apparently intermediate with 

 Verbesina and Helianthusy but without any shadow of affi. 

 nity to Coreopsis. The calix and rays remove it from Ver- 

 besina; from Helianthus, notwithstanding an approximatiun 

 in some measure by the calix and discal florets. It is easi- 

 ly distinguished by the flat and marginated seed, furnish- 

 ed with transverse sutures and persistent awns. 



Species. 1. A. * squarrosa. Leaves broad lanceolate, 

 serrate; corymb paniculated; calix spreading, loose; disk 

 .subglobose, in fruit squarrose. Coreopsis alter?iifolia, L. 

 3. procera? C procera, Aiton. y. alba. Flowers white, 

 without rays. Is it of this genus? 



2. Helianthoides. Leaves lanceolate, acute, serrate, un- 

 der side canescently villous; corymb simple, coarctate. 

 Had. In the open forests of Ohio, Kentucky, Tennessee 

 and Lower Louisiana. — Stem distinctly alated as in the 

 preceding; leaves attenuated above; flowers ^qv^ and larg- 

 er, from 4 or 5, probably to 10 or 11; rays about 8, (in the 

 preceding 3 and 4), golden-yellow; calix foliaceous, much 

 like that of Hellanthus, but nearly a simple series of seg- 

 ments; leaflets linear-lanceolate, partly spreading, seed 

 persistently bisetose, flat. 3. alata. Coreopsis alatUt Ph. 

 2. p. 567. but in this the leaves are opposite. 



To this genus appears to belong Coreop s alata and C. 

 ovata of Mexico. 



~ fFrom ctKTtr, a rayy and ^'?'i 9 a part; the duwcr being 

 imperfectly radiated. 



VOL. II. O 



