180 FOUNDATIONS OF BOTANY 
1. A. cannabinum, L. InpiaAn Hemp. Stem erect, smooth, with 
numerous erect or ascending branches. Leaves oval to oblong, 
mucronate at the apex, rounded at the base, downy beneath, short- 
petioled. Cymes terminal, compact, shorter than the leaves. Flowers 
are on short, bracted pedicels, greenish-white, about + in. broad. 
Calyx-lobes lanceolate, nearly as long as the tube of the corolla. 
Corolla-lobes erect. Pods very slender, tapering, 3-4 in. long. 
Along fences and in thickets.* 
2. A. androsemifolium, L. DoGpane. Plant 2-3 ft. high, 
usually smooth, purplish, the branches spreading and forking. 
Leaves 2-3 in. long, acute, mucronate, petioles about 3 in. long. 
Cymes mostly terminal, few-flowered. Calyx-teeth lance-ovate, 
about half as long as the corolla-tube. Corolla pale red or whitish, 
its lobes recurved. Pods stouter than in No. 1. Roadsides and 
clearings, common. 
IV. NERIUM, L. 
Shrubs. Leaves mostly whorled in threes. Flowers in termi- 
nal cymes. Calyx small, lobes acute. Corolla salver-form, 
the throat of the tube crowned with cleft or cut-fringed 
scales. Stamens 5, short, included; anthers tipped with a 
hairy bristle. Ovary of 2 carpels; style short. Pods erect, 
seeds with a tuft of hairs.* 
1. N. Oleander, L. Oreanper. Stem erect, diffusely branched 
from below, 4-10 ft. high. Leaves narrowly elliptical, acute at each 
end, thick and leathery, short-petioled. Flowers showy, in large 
clusters, red or white, often double; scales of the crown 3—4-pointed » 
unequal teeth; pods spindle-shaped, 3-4 in. long. Introduced from 
Palestine, common in cultivation.* 
81. ASCLEPIADACEZ. MILtkwerep FAmILy. 
Shrubs or herbs, often twining; juice usually milky. 
Leaves generally opposite or whorled, entire, without stipules. 
Flowers regular. Calyx 5-parted. Corolla 5-parted. Sta- 
mens 5; the filaments usually cohering around the styles, 
often with hood-hke appendages, each with an incurved horn 
borne on the stamen-tube and forming a crown around the 
stigma (Fig. 20, A); anthers pressing against the lobes of the 
stigma ; the pollen clinging together in tough, waxy or fine- 
