ASCLEPIADACE^E. (illLKWEED FAMILY.) 353 



7. A. quadrifolia, Jacq. (Fodk-leaved Milkweed.) Nearly smooth 



(10'- 18' liigli), slender ; leaves ovate, or sometimes oiate-lanccolate, petioled, usually 

 tapes -pointed, the middle ones in whorls of four ; pedicels capillary ; divisions of the 

 [pah pink) corolla oblong ; hoods of the white crown elliptical-ovate, the incurved 

 horn short and thick; pods linear-lanceolate, smooth. — Dry woods and hills; 

 rather common. June. — Leaves 2' -4' long, variable on the same plant, some- 

 times all opposite, rarely with two whorls. Umbels 2-5; peduncles l'-lj' 

 long : the flowers rather small (corolla-lobes 2^" long), but handsome. 



8. A. ]>arvi(16ra, Pursh. (Small-flowered Milkweed.) Nearly 

 smooth; the stems (l°-2° high) persistent, or slightly woody towards the base, 

 slender; leaves lanceolate, tapering to both ends, petioled, ad opposite; umbels 

 somewhat panicled, pedicels much shorter than the peduncle ; flowers white 

 tinged with purplish (the buds l"long); divisions of the corolla ovate; the 

 slender incurved horn longer than the hood. — S. Indiana, Illinois, and south- 

 ward. July. — Coma of the seeds wanti 



9. A. ototusifojia, Michx. (Wavy-leaved Milkweed.) Smooth and 

 glaucous; stem simple (2° -3° high) , bearing a single terminal umbel on a long naked 

 peduncle (3'- 12' long) ; leaves oblong or ovate-elliptical ', very obtuse but mucronate 

 (2 -5' long), sessile and partly clasping by a heart-shaped base, the man/ins wary ; 

 pedicels very numerous, elongated ; divisions of the [greenish-purple) corolla ob- 

 long; hoods of the crown truncate and somewhat toothed at the summit, shorter 

 than the slender awl-pointed horn; pods smoothish. — Sandy woods and fields : 

 not rare. July. — Flowers large (petals 4" -5" long). 



10. A. rubra, L. (Red-flowered Milkweed.) Smooth, slender (1° - 

 2° high), bearing 1 -3 few-flowered umbels at the naked summit of the stem (on a 

 peduncle 2' - 3' long) ; leaves ovate-lanceolate or oblong-ovate, tapering to a very sharp 

 point, rounded or slightly lieart-shaped at the base, very short-pt tioh <l ; divisions of the 

 corolla [reddish-purple) lanceolate, acute; hoods of the crown oblong, acutish (pur- 

 ple tinged with orange), with an awl-shaped and slightly incurved sbort horn ; 

 pods smooth. (A. laurifolia, Michx. A. acuminata, Pursh.) — Low grounds, 

 pine barrens of New Jersey to Virginia and southward. July. — Leaves 2' -4' 

 long, rough-ciliate. 



11. A. paupurcula, Michx. Veiy smooth; si em wand-like, slender (2° - 



3° high), bearing 1 - several few-flowered umbels at the summit of a naked and usu- 

 ally elongated terminal peduncle (rarely with one or two lateral ones) ; leaves 

 linear, much elongated, slightly petioled; divisions of the [purple) corolla linear- 

 oblong, half the length of the pedicels; hoods of the crown (orange-yellow) spat- 

 ulate-oblong, much longer than the awl-shaped incurved born. — Wet pine bar- 

 rens, New Jersey to Virginia near the coast, and southward. July, Aug. — 

 Leaves 5' -10' long, l"-6" broad; the. flowers large and showy. 



+* ++ Stem paniculately branching. 



12. A. incarnata, L. (Swamp Milkweed.) Smooth, or nearly so, 

 the stem with two downy lines above and on the branches of the peduncles 

 (2° -3° high), very leafy; leaves oblong-lanceolate, acute or pointed, obtuse at 

 the base, distinctly petioled ; umbels many-flowered, somewhat panicled, ou 

 peduncles half the length of the leaves; divisions of the corolla ovate, reddish' 



30* 



