SYNGENESIA FRUSTRANEA. 419 



346. CHRYSANTHEMUM. Ox-eye Daisy. 



C. leucanthemum : leaves amplexicaul, lanceolate, serrate, laciniate- 



dentate at the base ; stem erect, branching. 

 HAB. Fields, &c. May Nov. TJ. ; stem 1218 in. high. ; flowers 



large, wh. . 



347. ANTHEMIS. May-weed. 



A. cotula : receptacle conic ; chaff bristly ; seed naked ; leaves bipin- 



nate ; segments subulate, 3-parted. 

 HAB. Waste grounds. June Nov. <v); erect; fl. in termin 



corymb. ; Jl. w!i. . 



348. ACHILLEA. Milfoil. 



A. millefolium : leaves bipinnatifid, hairy ; segments linear, toothed, 



mucronate ; calyx sulcate. 

 HAB. Fields, &c. June Sept. ^ ; a foot high ; corymb, dense ; 



fl. wh. or rose-col. . 



349. HELENIUM. False sunflower. 



H. autumnale; leaves lanceolate, serrate, decurrent; flowers corymb- 



ed ; florets of the disk 5-cleft, of the ray flat, reflcxed. 

 HAB. Low meadows. August Sept. Tj. ; stem 2 3 feet high, 



winged ; fl. yell. 



FRUSTRANEA. 

 350. HELIANTHUS. Sunflower. 



t Leaves opposite. 



H. mollis : stem smooth below, scabrous above ; leaves ovate-lanceo- 

 late, acute, serrate, scabrous on the upper surface, pubescent and 

 hairy beneath ; flowers few, terminal. 



HAB. Swamps. Aug. 1\.\ stem 3 6 feet high; leaves very acute 

 Jl. few ; cat. hairy. 



H. divaricatus: stem smooth, branched; leaves subopposite, sessile, 

 ovate-lanceolate, triply nerved, scabrous above, smooth beneath ; 

 panicle trichotomous, slender ; flowers very small. 



HAB. Rocky woods. Aug. Ij. ; stem 4 6 ft. high ; leaves suba- 

 eliminate. 



H. frondosus : stem smooth below ; leaves ovate, acutely serrate ; pe- 

 duncles scabrous ; calyx squanose, undulate, leafy, ciliate ; rays 8. 



HAB. Woods. Aug. Sept. 1\. ; stem 4 5 feet high; flowers 

 small. 



H. track elifolius : leaves ovate-lanceolate, acuminate, serrate, triply 

 nerved, very scabrous above and beneath; scales of the calyx linear- 

 lanceolate, ciliate, the exterior ones longer. 



