510 ASCLEPIADACEAE 



Corolla white; umbels dense. 10. A. variegata. 



Corolla pink; some of the leaves in 4's. II. A. quadrifolia. 



Under surface of leaves hairy. 12. A. syriaca. 



Leaves narrowly linear, all verticillate. 13. A. verlicillata. 



i. A. tuberosa L. In dry fields: Me. and Ont. to Minn., Fla., 

 Tex. and Ariz. 



Throughout the range, but not very common. Broad-leaved 

 races have been referred to A. decumbens L. 



2. A. lanceolata Walt. In swamps: N. J. to Fla. and Tex., 



mostly near the coast. 



N. J. The region of coastal salt marshes and swamps from Point 

 Pleasant to Cape May, N. J.; apparently not in the pine-barrens. 



3. A. rubra L. In moist soil: N. Y. and Pa. to Fla., La. and Tex. 



N. Y. The south side of L. I. 



N. J. Throughout the coastal plain, especially in the pine-barrens; 



unknown elsewhere. 

 Pa. Bucks, Montgomery, Delaware and Chester counties. 



Tertiary, common throughout: Cretaceous, common: Older 

 Formations, decreasing and becoming scattered: 168-220 days. 

 About sea level. 



4. A. purpurascens L. In dry fields and thickets: Mass. to Va., 



Ont., Minn, and Kan. 

 Common throughout Conn., N. Y. and Pa. 



N. J. Frequent north of the coastal plain, thence decreasing 

 southward through Monmouth, Burlington, Camden, Atlantic and 

 Gloucester counties; not in the pine-barrens, nor along the coast. 

 Tertiary, apparently wanting: Cretaceous, rare: Older Forma- 

 tions, increasing northward. 117-220 days. Sea level-3,980 ft. 



5. A. incarnata L. In swamps: N. B. to the N. W. Terr., Tenn., 



La. and Kan. 



Conn. Not uncommon throughout the state, apparently more 



frequent in the northwest than elsewhere. 

 N. Y. Very rare on L. I. near N. Y. on the north shore, and at 



Bull's Head, S. I., rare and local in Rockland Co., increasing 



northward. 

 N. J. Passaic, Sussex, Morris and Hunterdon counties. 

 Pa. Northampton, Bucks, Delaware and Chester counties. 



Tertiary, 0: Cretaceous, 0: Older Formations, increasing north- 

 ward. Doubtfully, if at all, on the coastal plain. 117-220 days. 

 Sea level-3,900 ft. 



