ASTERACE^E. 



SPILANTHES. 



Head many-flowered ; either heterogamous, with the florets of 

 the ray ligulate, ? , usually small ; or homogamous with all the 

 florets *, tubular, 4-5-toothed. Involucre in 2 rows, appressed, 

 shorter than the disk ; the outer scales somewhat leafy ; the 

 inner rather membranous and folded up. Branches of the style 

 in the cf truncate and pencilled at the apex. Anthers blackish. 

 Achaenia of the disk compressed, not beaked, usually ciliated at 

 the sides or not aristate ; of the ray, when there is any, trique- 

 trous or obcompressed. DC. 



923. S. oleracea Jacq. hort. vind. ii. t. 135. DC.prodr. v. 624-. 

 Bidens fervida Lam. diet. i. 415. Para and other parts of 

 South America. 



Stem branched, diffuse. Leaves opposite, stalked, broadly ovate, 

 obtuse at the base, truncate or somewhat cordate, repand-toothed. 

 Pedicels 1-headed, longer than the leaf. Heads thick, ovate, discoidal. 

 Involucral scales 15-16, oval-oblong. Achagnia ciliated at the angles 

 biaristate, or awnless. The whole plant, but especially the involucre 

 and receptacle, act as a powerful stimulant of the salivary organs. 



CALEA. 



Head many-flowered, either homogamous or radiant. Ray . 

 Involucre ovate, or occasionally campanulate ; scales imbricated, 

 usually obtuse and dry. Receptacle more or less conical, palea- 

 ceous. Branches of the style in the $ without appendages. 

 Achaenium taper, compressed, or angular. Pappus of 5-20 paleae, 

 usually of about 10, linear-lanceolate, scarious, acuminate, 1- 

 nerved, nearly equal. DC. 



924. C. jamaicensis Linn. sp. 1 1 79. Swartz.fl. ind. occ. 1 327. 

 DC. prodr. v. 672. (Sloane i. 257. 1. 151. f. 3.) Westlndia 

 Islands. (Halbert weed.) 



A shrub, with round, lax, downy branches. Leaves stalked, ovate, 

 acuminate, subserrated, 3-nerved, scabrous on the upper side, hairy on 

 the under. Heads pedicellate, about 3 at the end of the branches, 

 ovate, discoidal. Involucral scales ovate, hairy externally ; paleae lan- 

 ceolate. Paleas of the pappus serrated. DC. The leaves contain a 

 powerful bitter, and, steeped in wine or brandy, form a stomachic 

 medicine in the West Indies. Linncea ix. 512. It is, however, not 

 certain that this account does not rather apply to Neurolcena lobata y 

 RBr., the Caleya lobata Swartz. 



ANTHEMIS. 



Head many-flowered, heterogamous. Florets of the ray in 1 

 row, ligulate, $ , (rarely 0, or somewhat tubular) ; of the disk $?, 

 tubular, 5-toothed. Receptacle convex, oblong or conical ; covered 

 with membranous paleae between the flowers. Involucre imbri- 



458 



