ASCLEPIADACEAE 251 



Leaves in i or 2 whorls of 4's : corolla pink. 10. A. quadrifolia. 

 b. Plants more or less pubescent, the lower surface of the leaves, at least, 

 copiously pubescent. 11. A.Syriaca. 



B. Leaf-blades linear. 12. A. verlicillata. 



1. Asclepias tuberosa L. BuTrERFi,Y-WEED. Pi,Eurisy-rooT. 

 (Man. p. 741; I. F. /. zgoo.) In dry fields, Me. and Ont. to Minn., 

 Fla., Tex. and Ariz. — Pennsylvania Northampton ; Bucks ; Phii,a- 

 DEi,PHiA ; Dei,aware ; Lancaster ; Franki,in ; Huntingdon ; Ai,i,b- 



GHENY. 



2. Asclepias decumbens L. Decumbent ButterfI/Y-weEd. (Man. 

 p. 741 ; L F. f. zgoi.) ■ In dry fields, Conn, to 111., N. C. and Via.— Penn- 

 sylvania : Northampton ; Lancaster ; Frankun. 



3. Asclepias rubra L. RED Mii<kwEEd. (Man. p. 742 ; I. F. /. 

 2^03.) Moist soil, N. J. and Pa. to Fla., La. and Tex. — Pennsylvania . 

 Bucks ; Montgomery ; Delaware ; Chester ; Lancaster. 



4. Asclepias purpurascens L- Purpi,E Mii<kweed. (Man. p. 742; 

 I. F. f. 2904.) In dry fields and thickets, Mass. to Va., Ont., Minn, and 

 Kans. — Pennsylvania: Monroe; Bucks; Dei,aware ; Chester; 

 Franki,in ; Huntingdon. 



5. Asclepias incarnata L. Swamp Mukweed. (Man. p. 742 ; I. F. 

 /. 2905.) In swamps, N. B. to the N. W. Terr., Tenn., La. and Kans. — 

 Pennsylvania : Northampton ; Bucks ; Delaware ; Chester ; Frank- 

 lin ; Huntingdon ; Lebanon ; Erie ; Allegheny. 



6. Asclepias pulchra Ehrh. Hairy Milkweed. (Man. p. 742 ; I. 

 F./.'2po6^) In moist fields and swamps. Me. to Minn, and Ga. — Pennsyl- 

 vania : Northampton ; Lancaster ; Chester. 



7. Asclepias amplezlcaulis J. E. Smith. (Man. p. 742; I. F. /. 

 29op.) In dry fields, mostly in sandy soil, Me. to Fla., Minn., Kans. and 

 Te^.— Pennsylvania : Monroe ; Luzerne ; Bucks ; Delaware ; Ches- 

 ter ; Lancaster ; Franklin ; Fulton ; Huntingdon. 



8. Asclepias exaltata (L. ) Muhl. Poke or Tall Milkweed. 

 (Man. p. 743; I. F. /. 2911.) In thickets and woods. Me. to Minn., Ga. 

 and Mo. — Pennsylvania : Monroe ; Lackawanna ; Luzerne ; Bucks ; 

 DELAWARE ; Chester ; Lancaster ; Susquehanna ; Fulton ; Alle- 

 gheny. 



9. Asclepias varlegata L. White Milkweed. (Man. p. 743 ; I. F. 

 / 2gi2.) In dry woods and thickets, Conn, to 111., Fla., Ark. and La. — 

 Pennsylvania : Northampton ; Bucks ; Delaware ; Chester ; Lan- 

 caster ; York ; Huntingdon. 



10. Asclepias quadrifolia Jacq. Four-lEaved Milkweed. (Man. 

 p. 743 ; l.'B. f. 2913.) Woods and thickets, Me. and Ont. to Minn., N. 

 C. and Ark. — Pennsylvania: Pike; Monroe; Northampton; Bucks; 

 Delaware ; Chester ; Lancaster ; Montour ; Franklin ; Somer- 

 set; Allegheny. 



11. Asclepias Syriaca L. Common Milkweed. Silkweed. (Man. 

 p. 743 ; I. F. _/ 2914. ) In fields and waste places, N. B. to the N. W. 



