37. 



COREOPSIS TINCTORIA. 



Dyeing Tick-seed Sunflower. 



Syngenesia. Polygamia-Frustranea. 



Class 19. Orders. 



Coreopsis : from x.opis, cimex, a bug or tick ; and o^^/is, fades, ap- 

 pearance ; the seeds having some resemblance to these insects. 



Linn. gen. ?z. 981 . 



GENERIC CHARACTER. 



Cal. common, either simple, subimbricate, or doubled j the exterior 

 usually with eight leaflets, which are coarse, and placed in a circle 3 

 the interior with as many larger ones, membranaceous, and colour- 

 ed. Cor. compound rayed : corollets hermaphrodite numerous in 

 the disk : females eight in the ray. Stam. in the hermaphrodites : 

 filaments five, capillary, very short. Anther cylindric, tubular. 

 Pist. in the hermaphrodites : germ compressed ; style filiform, 

 length of the stamens ; stigma bifid, acute, slender : in the females, 

 germ like the hermaphrodites ; style and stigma none. Per. none. 

 Calyx scarcely altered. Seed in the hermaphrodite solitary, orbi- 

 culate, convex on one side, concave on the other, with a transverse 

 protuberance at top and bottom, surrounded by a membranaceous 

 edge, with a two-horned tip : in the females none. Recept. chaffy. 



SPECIFIC CUAKACTER. 



Leaves linear, pinnate, opposite ^ the rays of the flower dark red near 

 the disk. 



