SYNGENESIA ^EQUALIS. 407 



342. INULA. Calyx imbricate ; florets of the ray numerous, (yellow ;) 

 receptfide naked; pappus simple, scabrous; (sometimes vfith & 

 minuie, exterior, chaffy pappus.) 



343. ASTER, L^alyx imbricate, with the lower scales often spre- ling , 

 florets of the ray generally more than 10, rareiy fewer, (not y iV>w ;} 



receptacle naked ; pappus simple. 



344. SOLIDAGO. Calyx imbricate, scales connivent ; florets of the 

 ray about 5, (yellow ;) receptacle naked ; pappus simple, scab- 

 rous. 



345. SENECIO. Calyx subcylindric, equal, scaly at the base; scales 

 withered at the points; receptacle naked; pappus simple. (Ravs 

 sometimes wantiiu.) 



346. CHRYSANTHEMUM. Calyx hemispherical, imbricate ;. scales 

 with membranaceous margins ; receptacle naked ; pappus 0. 



347. ANTHEMIS. Calyx hemispherical; scales nearly equal, with 

 scarious margins ; receptacle convex, with flat rigid chat* , seed 

 crowned with a membranaceous border. 



348. ACHILLEA. Calyx ovate, imbricate, unequal; rays r < 10, 

 roundish-obcordate ; seeds without pappus or border. 



349. HELENIUM. Calyx simple, many-parted ; rays 3-cleft ; re^epta- 

 cle naked, globose, chaffy on the margin ; seed villous ; papp\ s <>'" 5- 

 awned scales. 



FRUSTRANEA. 



350. HELIANTHUS. Calyx imbricate, subsquarrose, leafy, recent. 

 chaffy, flat ; pappus chaffy, 2-leaved, caducous. 



351. RUDBECK1A. Calyx subequal, mostly double ; receptacle conic , 

 chaffy : pappus a 4-toothed margin. 



352. BIDENS. Calyx subequal, leafy or scaly at the base; rays ofter- 

 wanting ; receptacle chaffy, flat ; pappus consisting of 2 4 retrorse 

 ly scabrous awns ; seed quadrangular. 



SYNGENESIA. 



^EQUALIS. 

 species. 323. CICHORIUM. Succory. 



C. Intybus : flowers axillary, sessile, in pairs; leaves runcinate. 

 HAB. Fields. July Sept. 9^; stem 2 3 feet high, branched, 

 rough ; flower large, blue. . 



324. LEONTODON. Dandelion. 



L. Taraxacum : exterior scales of the calyx rcflexed ; leaves runcin- 



ate, smooth, dentate. 



HAB. Pastures, &c. April Nov. 7].; smooth; leaves radical} 

 flower large, -yellow. 



