308 SYNGENESIA.— FRUSTRANEA, 



HAB. Fields and waste grounds. July — Nov. © . 



Stern much branch. ; fl. wh., disk yell. §. 

 2. A. Cotula : receptacle conic ; chaff bristly ; seed 



naked ; leaves bipinnate ; segments subulate, 3- 



parted. 

 HAB. Waste grounds. June — Nov. 0'. Erect; 



fl. in termin. corymb. ; fl. wh. §. 



496. ACHILLEA. Milfoil. Composite*. 



1. A. Ptarmica : leaves linear, acuminate, acutely and 



equally serrate, smooth. 

 HAB. Dry swamps. Aug. U. Fl. white. §? 



2. A. Millefolium : leaves bipinnatifid, hairy; seg- 



ments linear, toothed, mucronate ; calyx sulcate. 

 HAB. Fields, &c. June— Sept. U. Afoot high: 

 Qorymb dense ; fl. wh. or rose-col. §. 



497. HELIOPSIS. Composite. 



H. Iczvis: leaves opposite, ovate, serrate, triply-nerved. 

 HAB. Banks of rivers. July— Aug. U. Stem 2 ft. 

 high ; leav. smooth ; fl. large, yell. 



498. HELENIUM. False sunflower. Composite. 



II. autumnal e : leaves lanceolate, serrate, decurrent ; 

 flowers corymbed ; florets of the disk 5-eleft, of 

 the ray flat, reflexed. 

 IIAB. Low meadows. Aug. — Sept. H . Stem 2 

 « — 3 ft. high, winged ; fl. yell. 



FRUSTRANEA. 



499. HELIANTHUS. Sunflower. Composite^. 



* Florets of the disk dark purple. 



1. H. atrorubens: hispid; stem naked towards the 

 summit ; loosely paniculate ; leaves spathulate. 

 oblong-ovate, crenate, triply-nerved, scabrou.9 on 

 the upper surface ; scales of the calyx ovate-lan- 

 ceolate, as long as the disk. 

 1JAB. Dry soils. Aug.— Sept. %. Stem &— 4 ft< 

 " high; leav. opp., very long ; rap yell. 



