ASCLEPIADACE^E. (MILKWEED FAMILY.) 3t>3 



7. At qiiadrifolia, Jacq. (FOUR-LEAVED MILKWEED.) Nearly smooth 

 (10'- 18' high)> slender ; leaves ovate, or sometimes 01 ate-lanccolate, petioled, usually 

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

 (paU 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 I'-l^' 

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



8. A. parviflora, Pursh. (SMALL-FLOWEKED MILKWEED.) Nearly 

 smooth; the stems (1 2 high) persistent, or slightly woody towards the base, 

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

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

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

 slender incurved horn longer than the hood. Barrens, Green River, Kentucky 

 (Short), and southward. July. 



9. A. obtusifolia, 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 margins wavy ; 

 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 13 few-Jlowered 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 heart-shaped at the base, very short-petioled ; 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 short 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. pailpei'Cllla, Michx. Very smooth,- stem wand-like, slender (2- 

 3 high), bearing 1 - several few-Jlowered 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 horn. 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- 



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