FAM. 146, 115 



5. Shrubs with leaves opposite or in 4's; corolla funnel-bellform. flow- 

 ers solitary or few together. Cultivated. - Alia ma nd a 

 Bushy or climbing shrubs with yellow A. oeriifolia, Hendersonii, Wil- 

 liamsn . rarely with purple flowers (Blanchetti 



146. Asclepiadaceae, Milkweed Family. 



Herbs, vines or shrubs, mostly with milky sap; leaves 

 opposite, alternate or whorled, without stipules; flowers 

 perfect, mostly umbellate, 5-parted; calyx interior, its 

 tube short or absent; corolla-lobes usually refiexed; between 

 the corolla and the stamens is the crown, adnate to the 

 one or the other, or to both; filaments usually monadelphous 

 or distinct, the anthers converging around the stigma; 

 anther-cells with a scarious membrane or unappendaged ; pol- 

 len coherent into waxy or granular, pear-shaped masses, 

 POLLINIA, connected with the processes of the stigma; 

 ovaries 2; styles 2, with a common fleshy stigma; fruit 

 of 2 several-seeded follicles; seeds compressed, usually 

 with a long coma. 



1. Crown annular, saucer-or cup-shaped; mostly twiners, 



Vincetoxicum (Gonolobus) 



V. (G) suberosum. Stem slender, twining, with ovate-oblong, thickish leaves, 

 and the flowers in racemes; corolla brown-purple; crown an annular disk 

 undulately 5- or 10-crenate, adnate to the corolla; stigma depressed; pol- 

 linia pyriform, rounded at the base, with broad winged caudicles; folli- 

 cles 3-5 angled. Riverbanks. Spring and Summer. 



V. (G.i Floridanum. Stem slender, hirsute, with ovate, tapering leaves; ra- 

 cemes about as long as the petioles; corolla dull-greenish or purplish; crown 

 red-purple, saucer-shaped, with 5 broad undulations, each bidentate at 

 the apex, and a smaller tooth on each side in the middle; pollinia oblong 

 with broad caudicles. Sandy soil. Summer. 



V. gonocarpos (G. macrophyllus). Stem slender, high-climbing; leaves broadly 

 ovate, cordate; cymes few-flowered with fleshy peduncles; corolla dull- 

 greenish; crown a low 10-undulate fleshy ring; stigma depressed; pollinia 

 pear-shaped with broad caudicles. River-hammock. Early Summer. 



V. hirsutum (G. hirsutus. Stem twining, thinly hirsute; leaves ovate, cordaU ; 

 acuminate; umbels 6-S flowered; corolla brown-purple to greenish yellow; 

 crown cup-shaped, fleshy; pollinia oblong. Thickets Summer. 

 1. Crown of 5 depressed spreading segments; evergreen woody vine, - Hoya 

 H. carnosa, Wax-plant. Leaves oval-oblong, fleshy; flowers in dense un. 

 pink, wax-like. Cultivated. 

 1. Crown 5-lobed; slender twining vines. ------ Seutera 



S. palustris (maritima). Shrubby at the base; stem filiform with fleshy, linear 

 drooping leaves; long-peduncled umbels, several fl corolla purplish 



or greenish, with crown attached to the very short column; pollinia oblong 

 on stout caud. .--alt mar 



I. Parts of crown hooded. --------- 



