364 asclepiadacejE. (milkweed family.) 



long as the peduncle ; corolla deep red ; leaves of tlie crown oblong, erect, 

 bright orange, more than twice as long as the subulate incun'ed horn and the 

 short-stalked gynostegium ; follicle lanceolate, minutely pubescent. — Marshes, 

 Florida, and northward. June and July. — Stem 2° -4° high. Leaves 6'- 12' 

 long. Corolla 3" - 4" long. 



11. A. Curassavica, L. Stem somewhat shrubby, branching, slightly 

 pubescent, leafy to the summit ; leaves thin, lanceolate, acuminate, smooth ; 

 umbels corymbose, long-pcduncled, 8 - lO-flowered, pubescent ; pedicels much 

 shorter than the peduncle ; corolla scarlet ; leaves of the crown bright orange, 

 oblong, erect, longer than the stalked gynostegium, shorter than the thick in- 

 curved horn; follicle ovate-lanceolate, velvety. — South Florida. April -Nov. 



— Stem 1° - 2° high. Leaves 3' - 4' long. Corolla 3" long. 



-t- +- -t— Leaves opposite, ovate or oblong, more or less cordate, nearly sessile. 



12. A. rubra, L. Smooth; stem simple, naked at the summit; leaves 

 ovate or ovate-lanceolate, acuminate, rounded or slightly cordate at the base, 

 very short-petioled ; umbels 1-3, terminal, sessile, few-flowered; lobes of the 

 corolla lanceolate, acute, reddish-purple ; leaves of the crown oblong, acute, 

 purplish, barely longer than the subulate incurved horn, and twice as long as 

 the short-stalked gynostegium; follicle smooth. (A. laurifolia, Miclix.) — Wet 

 pine barrens, Georgia, and northward. June - July. — Stem 2° - 4° high. Leaves 

 2' - 4' long. 



13. A. obtusifolia, Michx. Smooth and somewhat glaucous; stem erect; 

 leaves oblong, undulate, mucronate, cordate and partly clasping at the base ; 

 umbels 1-3, lateral and terminal, long-peduncled, many-flowered ; corolla 

 greenish-purple ; leaves of the crown truncated and somewhat todthed at the 

 apex, rather longer than the gynostegium, much shorter than the subulate 

 incurved hom; follicle smooth. — Sandy soil, Florida, and northward. June- 

 July. — Stem 2° - 3° high. Leaves 2' - 3' long, the midrib very broad. Corolla- 

 lobes 3" long. Pedicels pubescent. 



14. A. amplexieaulis, Michx. Smooth and glaucous ; stem declining, 

 very leafy ; leaves large, fleshy, ovate, obtuse, cordate and clasping at the base, 

 veined with white; umbels 3-6, lateral and terminal, many-flowered, the smooth 

 and slender pedicels shorter than the peduncle ; corolla ash-color ; leaves of the 

 crown oval, obtuse, white, longer than the gynostegium, and the nearly straight 

 horn. — Dry sandy pine barrens, Florida to North Carolina. April and May. 



— Stems several, l°-2° long. Leaves 4'-5' long, the midrib broad and 

 prominent. 



I- -•- -1- -1- Tipper and lower leaves mostly opposite, Ike middle ones whorled. 



15. A. quadrifolia, Jacq. Somewhat pubescent; stem slender, simple ; 

 leaves thin, ovate or ovate-lanceolate, acuminate, contracted into a petiole, pale 

 beneath ; umbels 2-5, many-flowered, the slender peduncle longer than the 

 pedicels ; corolla pale-pink ; leaves of the crown white, oblong, obtuse, twice as 

 long as the gynostegium and stout horn. — Mountains of Carolina, and north- 

 ward. June-Aug. — Stem 1°- 1^° high. Leaves 2' -3' long. 



