ASCL^PIADACE^. (MILKWEED FAMILY.) S33 



7. A. quadrifolia, Jacq. (rouB-i-EAVED Milkweed.) Neadymnoalh 

 (10'- 18' high), slender ; leaves ovate, or sometimes ovatelancedate, petioled, usually 

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

 (pale 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'-lJ' 

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



8. A. parviflora, Pursh. (Small-plowehed Milkweed.) Nearly 

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

 slender ; leaves lanceolate, tapering to both ends, petioled, aU 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. — Barrens, Green River, Kentucky 

 (Short), and southward. July. 



9. A. obtusifolia, Michx. CWavt-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 u heart-shaped base, the margins wavy; 

 pedicels veiy 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-floweked Milkweed.) jSmootA, slender (1°- 

 2° high), bearing 1-3 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, acntish (pur- 

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

 pods smooth. (A. lanrifolia, il/t'cAa;. A. acuminata, PursA.) — Low grounds, 

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

 long, rough-ciliate. 



11 . A. paup€rcula, Michx. Very smooth ; stem wandiike, slender (2° - 

 8° 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 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 paniculatdy 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, on 

 pedunoles half the length of the leaves; divisions of the corolla ovate, reddish- 



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