278 MILKWEED FAMILY. 



A. Vertioill&,ta, Whorled M. Dry ground, l°-2° high, smoothi&h; 

 stems very leafy throughout ; leaves very narrow linear or tlu'eadTshaped, in 

 whorls of 3 - 6 ; flpwers greenish^vvhite. 



2. ACEBATES, GREEN MILKWEED. (Name from the Greek, means 

 without a Im-n, i. e. none to the hood-like appendages, in which it differs ii-om 

 Asclepias. ) Flowers green or greenish, in summer, y. 



§ 1 . Flowers in compact lateral umbels : corolla with oblong reflexed divisions : 

 the hoods erect : pods slender, sometimes downy, but with the surface even. 

 ' A. viridiflora. Dry sandy or gravelly soil :■ soft-downy or smoothish, 

 10-2° high; leaves varying from ovaf" to linear, mostly opposite; globular 

 umbels nearly sessile ; flowers short-pedicelled, nearly ^' long when open; 

 hoods not elevated above the base of the corolla. 



A. lougifolia. Low barrens W. & S. : rather hairy or roughish, 1° - 3° 

 high, with vei'y numerous mostly alternate linear leaves, flowers smaller and on 

 slender pedicels, the umbel peduncled, hoods elevated on a short ring of fila- 

 ments above the base of the 'corolla. ' i c . 



§2. Floxers. in,. loose, terminal .and solitary 'or corymbed umbels : divisions of the 

 corolla barely spreading, but the large hoods spreading and slipper-shaped : 

 pods thick, often with some soft tuberclerlike projections. 



A. paniqul^ta. Dry prairies and barrens from 111. S. & W. : smoothish, 

 1° high ; leaves alternate, oblong; or lance-oblong; flowers 1' broad, green, the 

 hoods purplish. ' 



3. ENSLENIA. (Named for ^4. ^nsZejj, an Austrian traveller.) "^ 



E. ^Ibida. Eiver-banks from Ohio S. & W. : climbing, 8°-120 ; smooth, 

 with opposite heart-ovate long-petioled leaves, and small whitish flowers in 

 raceme-like clusters on axillary peduncles, all late summer. , 



4. VINCETOXICUM. (Name is equivalent to Poison Periwinkle.) % 

 V. nigrum, fi-om Eu. ; a low-twining smooth weed, escaping from gardens 



E. ; leaves ovate and lance-ovate ; flowers small, brown-purple, rather few in 

 axillary umbels, in summer. 



5. GOlfOIjOBUS, (Name in Greek means anjiW porf.) Ours are twin- 

 ing, herbs, along rivej'-banks, chiefly S., with opposite heart-shaped petioled 

 leaves, and corymbs or umbels of dark or dull-colored small flowers, on pedun- 

 cles between the petioles, in summer. % 



G. Isevis. From Virg. to Illinois S. : smooth or only sparingly hairy, the 

 yellowish-green flowers and the longitudinally ribbed pods smooth. 



G. obliquus. From Penn. S. : hairy, somewhat clammy ; flowers mi- 

 nutely downy outside,, long and narrow in the bud, dull ci-imson-purple within, 

 the strap-shaped or lanceo"late divisions J' long ; pods ribless, warty. 



G. birstltus. From Virginia S. : differs from the last in its short-ovate 

 flower-buds, the oval or oblong divisioHS of corolla only about i' long. 



e. HOYA, WAX-PLANT. (Named for T. Hoy, an English florist.) 



H. carn6sa, a well-known house-plant from India; with rooting stems, 

 thick and fleshy oval leaves, umbels of numerous flesh-colored or almost white 

 flowers, the upper surface of corolla clothed with minute papillae. 



7. STEPHANOTIS. (Name from Greek for crown and ear, refen-ing to 

 the appendages of the stamens.) 



S. floriblinda, froiu Madagascai' : n fine hot-house twiner,, very smooth, 

 with opposite oval or oblong thickish leaves, and lateral umbels of very showy 

 fragrant dowers, the pure white corolla I J' in diameter, the tube 1' Ion". 



