MILKWEED FAMILY. 677 



ASCLEPIODORA Gray, Proc. Am. Acad. 12 : 66. 1876. 



Two species, perennials, Atlantic North America, southwestward. 



Asclepiodora viridis (Walt.) Gray, Proc. Am. Acad. 12 : 66. 1876. 



Paniculate Asclepiodora. 



Asclepias rh'idis Walt. Fl. Car. 107. 1788. 



Atianiherix paniculaia Niitt. Trans. Am. Phil. Soc. 5 : 203. 1837. 



Aceratea paniculaia Decsue. iu DC. Prodr. 8 ■ b'2\. 1844. 



Ell. Sk. 1:327. (4ray, Man. ed. 6, 339. Chap. Fl. 366. Gray, Syn. Fl. N. A. 2, pt. 

 1 : 89. Coulter, Contr. Nat. Herb. 2 : 265. 



Carolinian and Louisianiau areas. Southern Illinois, southern Missouri, Arkan- 

 sas, and from central Tennessee south to Florida, west to Louisiana, Texas, New 

 Mexico, and Utah. 



Alabama : Central Prairie region. Sunny dry places, borders of fields, and pas- 

 tures. Dallas County (/i'. J. Sww</i). Montgomery County. Flowers dark purplish 

 green; April, May. Not rare. 



Type locality : South Carolina. 



Herb. Geol. Surv. Herb. Mohr. 



AMPELANUS Raf. ; Britton, Bull. Torr. Club, 21 : 314. 1894. 

 (Enslenia Nutt. Gen. 1:164. 1818. Not Raf. 1817.) 



Ampelanus albidus (Nutt.) Britton, Bull. Torr. Club, 21:314. 1894. Sand Vine. 



Enslenia albida Nutt. Gen. 1 : 165. 1818. 



Gray, Man. ed. 6, 343. Chap. Fl. ed. 3, 349. Gray, Syn. Fl. N. A. 2, 1 : 100. Britt. & 

 Br. 111. Fl. 3: 16. 



Carolinian and Louisianiau aieas. Southern Pennsylvania, Ohio Valley, Missouri, 

 and Kansas ; south from Kentucky to upper Georgia, northern Mississi])pi, Texas, and 

 Arkansas. 



Alabama: Tennessee Valley. Banks of streams. .Jackson and Stevenson counties 

 {Herb JliUmore). Rare. 



Type locality: "Near Shepherdstown, on the gravelly banks of the Potomac, 

 Virginia. * * * Qu the high sandy banks of the river Scioto, etc., also near 

 Cincinnati." 



Herb. Biltmore. 



CYNANCHUM L. Sp. PI. 1 : 212. 1753. 



About 100 species, warmer regions of North and Soutli Africa, Asia, West Indies, 

 and America. Atlantic America, 2. Southern. 



Cynanchum palustre (Pursh) Heller, Cat. N. A. PI. 106. 1898, 



Ska.side Winding Milkweed. 



Ceropegia palustris Pursh, Fl. Am. Sept. 1 : 184. 1814. 



Lyonia maritima Ell. Sk. 1 : 316. 1817. 



Seufera maritima Decsne. in DC. Prodr. 8 : .590. 1846. 



Vincetoxicitm palustre Gray, Syn. Fl. N. A. 2, pt. 1 : 102. 1878. 



Ell. Sk. 1 : 316. Chap. Fl. 367. Gray, Syn. Fl. N. A. 2, 1. c. Coulter, Contr. Nat. 

 Herb. 2 : 269. Griseb. Fl. Brit. W. Ind. 418. 



Cuba, Bahamas. 



Louisianiau a'ea. Seashore of South Carolina to Florida, west to Texas. 



Alabaima: Littoral region. Mobile and Baldwin counties, salt marshes. Flowers 

 greenish; .June, July. Abundant. Perennial, twining around the coarser gluma- 

 ceous marsh plants. 



Type locality: "In salt mar.shes, winding around Scirpi and .Tunci: Carolina. 

 Lyon." 



Herb. Geol. Surv. Herlj. Mohr. 



VINCETOXICUM Walt. Fl. Car. 104. 1788. 

 (GoNOLOBUS Michx. Fl. Bor. Am. 1 : 119. IS03.) 



About 65 to 70 species, trailing or winding perennials ; West Indies, South America, 

 Mexico. Atlantic North America, chiefly Southern, about 17. 



Vincetoxicum gonocarpus laevis (Michx.) Britton, Mem. Torr. Club, 5 : 266. 1894. 



Smooth AN(iLE-POD. 



Gonolohus laevis Michx. Fl. Bor. Am. 1 : 119. 1803. 



Gray, Man. ed. 6, 344. Gray, Syn. Fl. N. A. 2, pt. 1 : 103. Coulter, Contr. Nat. Herb. 

 2 : 269. 



