368 
ASCLEPIADACEjE. (milkweed family.) 
four ; pedicels capillary ; divisions of the corolla oblong (pale pink); 
hoods of the white crown elliptical-ovate, the incurved horn short 
and thick; pods linear-lanceolate, smooth. — Dry woods and hills, 
common. June. — Leaves 2 r - 4' long, variable on the same plant, 
sometimes all opposite, rarely with two whorls. Umbels 2-5; pe¬ 
duncles long: the handsome flowers barely half as large as in 
Nos. 5 and 1. 
7. A, obtusifolia, Michx. (Wavy-leaved Milkweed.) 
Smooth and glaucous; stem simple (2°-3° high), bearing a single 
long-peduncled terminal umbel; leaves oblong or ovate-elliptical , very 
obtuse but mucronate, sessile and partly clasping by a heart-shaped 
base, the margins very wavy ; pedicels very numerous, elongated ; di¬ 
visions of the corolla oblong (greenish-purple); hoods of the crown 
truncate and somewhat toothed at the summit, shorter than the slen¬ 
der awl-pointed horn; pods smoothish. — Sandy woods and fields, 
not rare, especially southeastward. July. — Leaves 3' - 5 f long. 
Flowers larger than in No. 1. 
8- A. rubra, L. (Red-flowered Milkweed.) Smooth, 
slender (1°-2P high), bearing 1 - 3 fete-flowered umbels at the naked 
summit of the stem ; leaves ovate-lanceolate or oblong-ovate , tapering to 
a very sharp point , rounded or slightly heart-shaped at the base , very 
short-petioled; divisions of the corolla lanceolate, acute (reddish-pur¬ 
ple) ; hoods of the crown oblong, acutish (purple tinged with orange), 
with an awl-shaped and slightly incurved short horn; pods smooth. 
(A. laurifolia, Michx. A. acuminata, Pursh.) — Low grounds, New 
Jersey, Penn., and southward, rare. July.— Leaves 2^ — 4' long, rough- 
ciliate. Umbel mostly solitary on a peduncle 2 , -3 / long. 
9. A. pauperculu, Michx. (Slender Long-leaved Milk¬ 
weed.) Very smooth ; stem wand-like , slender (2°-3° high), bearing 
1 — several few-flowered umbels at the summit of a naked and usually 
elongated terminal peduncle (rarely with one or two lateral ones); 
leaves linear , much elongated , slightly petioled ; divisions of the (pur¬ 
ple) corolla linear-oblong, half the length of the pedicels; hoods of 
the crown (orange-yellow) spatulate-oblong, much longer than the 
awl-shaped incurved horn. — Wet pine barrens. New Jersey, rare, 
and southward. July, Aug. —Leaves 5'-10' long, l"-6" broad; 
the few but showy flowers larger than in No. 1. 
_ ++++ Stem panicidately branching. 
19- A. incarnata, L. (Swamp Milkweed.) Smooth, or 
nearly so, the stem with two downy lines above and on the branches 
and peduncles ; leaves oblong-lanceolate, acute or pointed, obtuse at 
the base, distinctly petioled ; umbels many-flowered, somewhat pani- 
cled, on peduncles half the length of the leaves ; divisions of the co¬ 
rolla ovate, reddish-purple ; hoods of the crown (flesh-color) ovate, 
about the length of the ascending or scythe-form awl-shaped horns; 
