COMPOSITAE 5*9 



Stigmas of perfect flowers with ter- 

 minal appendages. Tribe 3. Astereae. 



(Genera 8-20. See page 595.) 

 Stigmas of perfect flowers with trun- 

 cate or hairy or papillose tips. 

 Bracts of the involucre herbace- 

 ous. Tribe 6. Helenieae. 

 (Genus 38. See page 630.) 

 Bracts of the involucre dry and 

 scarious. Tribe 7. Anthemideae. 

 (Genera 39-44. See page 630.) 

 Bracts of the involucre little if at all, im- 

 bricated, except where the broad outer 



ones overlap the inner. Tribe 8. Senecioneae. 



(Genera 45-51. See page 635.) 

 Receptacle chaffy. 



Bracts of the involucre herbaceous, some- 

 times foliaceous. Tribe 5. Heliantheae. 



(Genera 27-37. See page 620.) 

 Bracts of the involucre dry and scarious. Tribe 7. Anthemideae. 



(Genera 39-44. See page 630.) 

 Anthers with elongated, cartilaginous, mostly connate 

 appendages at the tip. Tribe 9. Cynareae. 



(Genera 52-58. See page 636.) 



Tribe i. Vernonieae 



Pappus double; heads not glomerate. 1. Vernonia. 



Pappus single; heads glomerate. 2. Elephantopus. 



i. Vernonia L. 



Bracts of the hemispheric involucre, or some of them with subulate 



or filiform tips. I. V. noveboracensis. 



Bracts of the involucre merely acute, obtuse or truncate. 2. V. glauca. 



i. V. noveboracensis (L.) Willd. In moist soil: Mass. to Minn., 

 Ga. and Kan. 

 Conn. Throughout. 

 N. Y. Common on L. I. and S. I. and up the Hudson Valley to 



the northern end of the Highlands, thence decreasing northward, 



and perhaps wanting in the Catskills. 

 N. J. Throughout the state, except in the pine-barrens, there 



unknown, always increasing southward. 

 Pa. Delaware Co. 



Tertiary, unknown on Beacon Hill, common elsewhere: Cre- 

 taceous, common: Older Formations, decreasing northward, and 

 apparently wanting on the Piedmont Plateau in Pa. 138-220 days. 

 Sea level-1,500 ft. 



