SYNGENESIA.— SUPERFLUA. 291 



* Subgenus CHRYS0PS1S. Calyx imbricated,; rays 

 of the corolla mostly yellow ; anthers naked at the base ; 

 pappus double ; exterior paleaceous minute ; interior 

 scabrous, many-rayed ; seeds obovate, villous. 



2. I. mariana: hairy; leaves oblong-lanceolate, ser- 



rate ; upper ones sessile, acute ; lower spathulate, 

 mostly obtuse ; corymb simple ; calyx viscidly pu- 

 bescent. 

 HAB. Woods. Aug. U . Stem 18 in. high ; rays 

 10—12 oblong. 



3. l.falcata : woolly and villous; leaves sessile, linear, 



acute, rigid, subfalcate ; calyx subtomentose. 

 HAB. Pine-barrens. Sept— Oct. U . Stem 6—12 

 in. high ; ft. small. 



4. I. graminifolia : silky; leaves lanceolate, linear, 



acute, entire, nerved ; corymb compound ; stem 

 leafy towards the summit. 

 HAB. Sandy woods. Aug.— Oct. U . Stem 2 //. 

 high; leav. long, subrigid. 



487. ASTER. Starwort. Composite. 



* Calyx white, green at the summit ; florets of the ray 



about 5, white. 



1. A. solidaginoides : leaves linear-lanceolate, entire, 

 scabrous on the margin ; flowers sessile aggre- 

 gate ; calyx imbricate, with the scales obtuse, 

 appressed. 



HAB. Dry woods. July— Aug. U . Stem 2 ft. 

 high ; ft. fastig. -corymb. 

 2. A. conyzoides : leaves oval-lanceolate, acute, serrate 

 towards the summit, triply nerved ; the lower 

 ones attenuate at the base ; upper entire ; scales 

 of the calyx oval, obtuse, appressed, slightly re- 

 flexed at the summit. 



HAB. Woods and copses. July — Aug. U. Stem 

 2 ft. high; leav. thick; cal. cylivd. 



* * Florets of the ray numerous ; pappus single. 



| Leaves eniire. 



\. hyssopifolius : leaves linear-lanceolate, 3-nerved. 

 punctate, acute, scabrous on the margin ; branches 



