494 APOCYNACEAE 
calyx deeply 5-cleft (rarely 4-cleft) ; corolla 5-lobed; stamens 5 
(lobes of corolla sometimes 4 and stamens 4, but not in our species). 
Stamens not united, inserted on the corolla. Ovaries (in our 
species) 2, free from the calyx; styles united into 1. 
Leaves opposite. 
Flowers solitary’. .. s «-&. “oe % “<<< eee 
Flowers in clusters, small. . . . . . . Apocynum 
tT. VINCA, ©. 
Herbs, with opposite Jeaves and solitary blue or whitish flowers arising 
from leaf-axils. Our species a trailing herb which has escaped from 
cultivation. The leaves smooth at the edges, firm, dark green on both 
sides, egg-shaped, with short leaf-stalks. Flowers solitary, generally blue, 
with a short cylindric tube and 5 broad spreading lobes. Ovaries of 2 
long cylindric follicles, 
V. minor, L. Myrrie. PrrtwiInkie. In borders of woods and at 
roadsides. Blooms nearly all summer. 
2. APOCYNUM, L. 
Perennial herbs, with opposite leaves and white or pink flowers in 
spreading clusters, generally terminal. Calyx small, deeply 5-cleft; co- 
rolla bell-shaped, bearing at the throat 5 small triangular appendages. 
Stamens 5, inserted at base of corolla. Seeds in two long cylindric 
carpels. 
Branches spredding- . . « «3 «© « «© «© » «© « « « As, Ondroscemmonun 
Branches erect or nearly so. 
Base. of leaves tapering... « ._«s « « « ss @ «= As cannabvnumy 
Base of leaves rounded .. . - . . « A. hypericifolium 
1. A. androsaemifolium, L. (Fig. 1, pl. 123.) Spreaptne Doa- 
BANE. Stem 1 to 4 ft. high; branches spreading. Leaves broadly elliptic 
or oval, sharply pointed or blunt at apex, generally rounded at base. 
Corolla pink, the lobes shorter than the tube. Fields and roadsides, 
throughout our area. June-July. 
2. A. cannabinum, L. (Fig. 3, pl. 123.) Inpran Hemp. Resembles 
No. 1, but branches more erect; base of leaves narrowed or somewhat 
rounded. Lobes of corolla as long as or longer than the tube. Fields and 
thickets. June-Aug. 
3. A. hypericifolium, Ait. (Fig. 2, pl. 123.) CLAsSPING-LEAvED Doc- 
BANE. Plant smooth with a whitened bloom, 1 to 2 ft. high. Leaves ob- 
long to oval, obtuse at apex, heart-shaped or eclasping the stem at base. 
Central New York, Maine and northward. 
(Several forms, found in our area and differing in some respects from 
these have been described as species by some, as varieties by others.) 
Famity VI.— ASCLEPIADACEAE. MuinKweep FAmMILy 
Plants, with milky juice, with leaves opposite or in whorls or 
less frequently alternate, without lobes or teeth. Flowers in termi- 
