1658 



IPOMCEA 



IPOMCEA 



B. Sts. prostrate or creeping, not twi- 

 ning. 



c. Lf. -blades suborbicular, obcordate 

 or notched at apex: fls. blue or 



purple 7. Pes-caprae 



cc. Lf. -blades variously lobed or oblong- 

 lanceolate: fls. cream-colored .... 8. stolonif era 

 BB. Sts. twining or climbing. 



c. Sepals herbaceous, often elongated 

 and hairy; ovary and caps. 

 S-celled, 6-seeded (Pharbitis). 



D. Lvs. deeply 8-5-lobed 9. Lindheimori 



DD. Lvs. entire or S-lobed. 

 E. The sepals merely acute. 

 F. Corolla 1 l /2~2-in. long: Ivs. 



usually entire 10. purpurea 



FF. Corolla about 1 in. long: hs. 



usually 3-lobed 11. hirsutula 



EB. The sepals attenuate or caudate- 

 attenuate. 

 F. The Ivs. silvery-canescent or 



silky: corolla purple 12. mutabilis 



FF. The Ivs. hispid to glabrate, 



not canescent. 



G. Tips of sepals linear-attenu- 

 ate, hispid below, the tips 



spreading 13. hederacea 



oo. Tips of sepals long-acumi- 

 nate, not spreading, op- 

 pressed pubescent with sil- 

 very hairs 14. Learii 



cc. Sepals thick, rarely subherbaceous 



and then not elongated. 

 D. Corolla salver form; stamens 

 slightly exserted: st. woody below 

 (Exogonium). 

 E. The corolla scarlet, 1 J^ in. 



long: Ivs. lobed or entire 15. microdacty- 



EE. The corolla blue or purple, 2}/z [lum 



to 3 in. long 16. Purga 



DD. Corolla not salver form; stamens 

 rarely if ever exserted (Batatas 

 and Operculina). 

 E. The plants annual: sts. glabrous. 

 F. Lvs. linear or lanceolate, sub- 

 sessile: fls. small, white 17. angustifolia 



FF. Lvs. ovate-cordate: fls. large, 



red, blue, or purple 18. tricolor 



EE. The plants perennial, often with 

 large fleshy or woody roots or 

 rootstocks. 



F. Lvs. divided to the petiole into 

 3-^9 separate, stalked or ses- 

 sile Ifts.: peduncles equaling 

 or shorter than the petioles. 

 G. Fls. red: If.-segms. sessile, 

 tapering to both ends, 



margin wavy 19. Horsfalliae 



GO. Fls. white: If.-segms. stalked, 

 not tapering to the ends, 



margin not wavy 20. ternata 



GGG. Fls. yellow: If.-segms. ses- 

 sile, long-pointed 21. aurea 



FF. Lvs. deeply divided but not 



into separate Ifts. 

 G. Pedicels thickened and 

 fleshy; sepals accrescent in 

 fr., setaceous; corolla sub- 

 salverform, purplish red. . . 22. setosa 

 GG. Pedicels not thickened nor 



sepals accrescent. 

 H. Fls. white: segms. of 

 Ivs. much toothed or cut; 

 petioles and sts. hispid.. .23. sinuata 

 HH. Fls. rose-purple: Ivs. pal- 

 mately 5-7-lobed to be- 

 yond the middle 24. digitata 



FFF. Lvs. entire, angulate or lobed, 



not divided. 



G. Sts., Ivs. and peduncles 

 densely hairy: corolla fun- 

 nelform, its lobes obtuse: 

 If. -lobes unequal, blunt 25. bonariensis 



GG. Sts. and foliage not hairy. 

 H. The Ivs. sagittate, short- 

 petioled: fls. 2-3 in. long, 



purple 26. sagittata 



HH. The Ivs. cordate. 



i. Corolla small, l /i-%in. 



wide. 



3, Color of corolla yellow.. 27. chryseides 

 Jj. Color of corolla white: 

 fls. in dense cymose 



clusters 28. sidaefolia 



n. Corolla large, 2-4 in. long. 

 j. Foliage whitish tomen- 

 tulose: fls. cream-col- 

 ored with a magenta 



throat 29. macrorhiza 



Jj. Foliage not whitish to- 



mentulose. 



K. Color of corolla white, 

 3-4 in. long: caps, 

 large, 1 in. diam., 

 operculat e-dehis- 



cent 30. Tuba 



KK. Color of corolla white 

 with a magenta 

 throat: foliage pu- 

 bescent or glabrate; 

 Ivs. pale beneath. . . .31. pandurata 

 KKK. Color of corolla pink, 

 yellowish purple or 

 purple. 



L. Lvs. softly pubes- 

 cent, plicate-veined: 

 fls. pink or pur- 

 plish 32. Jalapa 



LL. Lvs. glabrous, acute, 

 cordate, hastate or 

 variously lobed. . . .33. Batatas 



1. longifdlia, Benth. (7. Cdrletonii, Holzin.). Sts. 

 glabrous, erect or ascending from a large tuberous root: 

 lys. linear-lanceolate to oblong-lanceolate, nearly ses- 

 sile: fls. large, 2-3 in. long, white. Prairies and plains, 

 Okla. to Texas and Mex. and Ariz. Contr. Nat. Herb. 

 1:17. 



2. leptophylla, Torr. BUSH MOONFLOWER. St. 2-5 

 ft. high, with many slender, recurving "branches : Ivs. 

 2-4 in. long, entire: peduncle stout, 1-4-fld., usually 



1961. Morning-glory, Ipomoea purpurea 



