96. CONVOLVULACE.^. 



[11. Ipomcea. 



Twining. L. similar but larger. Fls. *75" 

 Prostrate or twining. L. petioled. Fls. 



10. 



* * Leaves nearly or quite as broad as long :— 



Stem creeping. L. reniform. Fls. 'o- 



•75", sepals ciliate 11. 



Twilling. L. often 3-lobed, ovate cordate. 

 Fls. "7", in 3-7-fld. cymes, sepals gla- 

 brous 12. 



ii. Sepals pubescent {Ipomcsa) -. — 



Twining. L. ovate or suborbicular, cordate, 



entire 13. 



i. Flowers over 1", rarely yellow [Ipomoea, Merremia 

 a,nd Operculiua). Spp.'lJ.-20 :— 

 i. Peduncles 1-fld., more rarely 2-3-fld., often 2- 

 bracteate. Never widely scandeut : — 



* Creeping, prostrate or floating : — 

 Aquatic. L. mostly narrow . . .14. 

 Littoral. L. orbicular 2-lobed or emar- 



ginate 15. 



* * Prostrate or twining from a woody stock : — 



Glabrous. L. oblong to linear. Corolla 

 hirsute, sometimes yellow . . .18. 



Pubescent. L. ovate to oblong-lanc. 



Corolla glandular 19. 



ii. Peduncles usually several-many fld. Climbers: — 



* Calyx glabrous, without external glands : — 



! Herbaceous. Leaves under 3" : — 

 L. cordate-ovate 1-2", sometimes sub- 

 3-lobed. Fls. purple or white, sepals 

 •2- "3" ovate-oblong. Corolla gla- 

 brous 16. 



L. oblong, ell. or lanceolate, often cor- 

 date or hastate. Fls. white or cream. 

 Sepals •3-'35" ell. obtuse and apicu- 

 late. Corolla pubescent at tip ." . 17. 

 !! Shrubby. Leaves over 3" long : — 

 L. broadly ovate or ovate -oblong. 

 Calyx •3-'35". Corolla pubescent at 



tip only 17. 



Stems often sub-alate. Calyx 'G-'S". 



Corolla hirsute 18. 



** Calyx pubescent. Outer sepals much larger 

 than the inner, accrescent : — 

 Stems usually 3-4-alate. Calyx '7-1". 

 Corolla gland- dotted, otherwise gla- 

 brous 19. 



*** Calyx with outer sepals 2-glandular, 

 •25" :— 

 L. ovate-cordate acuminate. Corolla large, 



pink, puberulous 20. 



2. Leaves deepty 5-7-lobed or palmately compound :— 



a. Sepals hairy, -o" accrescent. Corolla yellow, 2" . 21. 



b. Sepals glabrous :— 



i. Leaves simple lobed. Exotics : — 



Lobes of leaf elliptic or lanceolate, subentire . 22. 

 Lobes of leaf again lobed or pinnatifid . . 23. 

 ii. Leaves digitate palmately compound. Fls. 



white 24. 



II. Ovary 3-celled, ovules 6 (Pharlitis) :— 



Leaves 3-lobed, hairy. Flowers blue or pink . . .25. 

 III. Ovary 4-celled. Ovules 4 (Batatas) •— 



Scandent. Leaves deeply palmately lobed . . . .26. 

 Prostrate. Leaves triangular or irregularly sharply lobed. 



Cultivated herb with tuberous roots 27. 



Several other species are often found in gardens, such as the 



hastata. 

 ccEspifosa. 



reniformis. 



chfi/seides, 



ohscura. 



I'eptans. 

 pes-caprcB. 



var. jMuciJlora. 

 var. humilior. 



sepiaria. 



cymosa, var. 

 petaloidea. 



turpethum, 



carnea. 

 vitifolia, 



palmata. 

 simiata, 



quinata. 



hederacea. 



digit at a. 



latatas. 

 Morning Glory 



593 



