AP0CYNACEA2. (DOGBANE FAMILY.) 365 
copses, common. June, July. — Corolla broad. Pods 3' - 4' long 
pendent. 6 ’ 
2. A. cannablnnm, L. (Indian Hemp.) Stem and branch¬ 
es upright or ascending , terminated by erect and close many-flowered 
cymes, which are usually shorter than the leaves; corolla (greenish- 
white) with nearly erect lobes , the tube not longer than the lanceolate di¬ 
visions of the calyx. — Var. 1. glaberrimum, DC. Entirely smooth ; 
leaves oblong or oblong-lanceolate, on short but manifest petioles, 
obtuse or rounded, or the upper acute at both ends.— Var. 2. pubes- 
cens, DC. Leaves oblong, oval, or ovate, downy underneath or on 
both sides, as well as the cymes. (A. pubescens, R. Br.) — Var. 3. hy- 
pericifolium. Leaves more or less heart-shaped at the base and on 
very short petioles, commonly smooth. (A. hypericifolium, Ait.) _ 
Copses and river-banks, common. July, Aug. — Plant 2° - 3? high, 
much more upright than the last, the flowers scarcely half the size! 
the different varieties run into one another greatly. 
Order 80. ASCEEPIADACE^E. (Milkweed Fam.) 
Plants with milky juice and opposite or wliorled (rarely 
scattered) entire leaves , follicular pods , seeds , Sfc., just as 
in the last family ; from which they differ in the commonly 
valvate corolla , and singular connection of the anthers with 
the stigma , the cohesion of the pollen into wax-like masses , 
&c., as explained under the typical genus. 
Synopsis. 
* Filaments monadelphous : anthers 2-celled, vertical: pollen-masses 
10, suspended in pairs from 5 glands of the stigma. 
1. Asclepias. Calyx and corolla reflexed, deeply 5-parted. Crown 
of 5 hooded lobes (nectaries, L ) with an incurved horn ris¬ 
ing from the base of each. 
2. Acerates. Calyx and corolla reflexed-spreading. Lobes of the 
crown concave, hornless. 
3. Enslenia. Calyx and corolla erect. Lobes of the crown flat, 
hornless, abruptly tipped with a 2-parted awn. 
* * Filaments monadelphous: anthers 2-celled, opening transverse¬ 
ly : pollen-masses 10, horizontal. 
4. Gonolobus. Corolla convolute in the bud. Crown a small wavy- 
lobed ring. 
* * * Filaments distinct: pollen-masses granular, 
o. Periploca. Corolla flat. Crown 5-cleft, 5-awned. Anthers 
bearded. 
31* 
