314 Flora of the Malayan Peninsula. 



Esseq. 103. Convolvulus Batatas, Linn. Sp. PI. 154 ; Eoxb. Flor. Ind. 

 I. 483, and ed. Carey & Wall. II. 69; Wall. Cat. 1356. C. indicus, 

 Moris. Hist. II. sect. I. t. 3, f. 4. C. edulis, Thunb. Fl. Japon. 84. C. 

 esculentus, Salisb. Prod. 123. Batatas edulis, Choisy Convolv. Or. 53, 

 and in DC. Prod. IX. 338. B. xanthorhiza Boj. Hort. Maurit. 225. 

 Eumph. Herb. Amboin. V. t. 130. Eheede Hort. Malab. VII. t. 50. 



Peeak : Larut ; Scortechini 1836 ! but doubtless also present in 

 other provinces, cultivated. 



The Sweet Potato ; very rarely seen in flower, still more rarely in fruit. A 

 native of America, but now grown throughout the tropics. 



6. Ipomoea illustris, Prain Beng. PI. II. 735. A glabrous climber. 

 Leaves ovate or oblong, cordate or hastate, entire, glabrous, apex 

 acuminate ; nerves rather prominent ; 4 to 6 in. long, 3*5 to 5 in. wide ; 

 petiole 1'5 to 2 in. long. Flowers in axillary cymes ; peduncles 1 to 

 1 '5 in. long, usually 2-3-flowered, often 1-flowered; bracts caducous; 

 pedicels -5 to 1-5 in. long. Sepals orbicular, obtuse, glabrous, -3 to 

 •4 in. long. Corolla rather wide-campanulate, purple, 4 to 4*5 in. 

 long, glabrous, limb 3 in. wide. Capsule -5 in. wide, globose. Seeds 

 with long silky hairs. I. campanulata var. illustris, Clarke in Hook. f. 

 Flor. Brit. Ind. IV. 211. 



Andamans : on the coasts, everywhere. Penang : Pulo Boetong, 

 Curtis 1970! — Distrib. Coasts of Ceylon, Sunderbuns, Indo-China, 

 and Malay Archipelago. 



This is very nearly allied to I. campanulata, Linn., which appears, however, to be 

 always an inland species, whereas this is always a littoral plant. I. illustris differs 

 further in having flowers at least one-half larger, sepals quite glabrous, and fewer 

 flowers to the cyme. 



7. Ipom(ea dbnticulata, Choisy in DC. Prod. IX. 379 {not of E. Br.). 

 A glabrous trailing or twining littoral herb. Leaves ovate-cordate, 

 acute, entire denticulate angled or sub-lobate, base rather deep- 

 cordate with an obtuse sinus, firm in texture but hardly fleshy ; 1 to 

 2-5 in. long, -75 to 1*75 in. wide ; petiole 1"5 in. long. Flowers axillary 

 on short 1-3-flowered peduncles, never more than 1*5 in. long ; pedicels 

 (often only one) 1 to 1'25 in. long ; bracts -2 in. long, linear. Sepals 

 elliptic, abruptly acute, sub-scarious, '4 in. long. Corolla 1-5 in. long, 

 tube funnel-shaped, abruptly widening at the mouth, purple. Ovary 

 2-celled. Capsule globose, "3 in. in diam., glabrous. Seeds smooth. 

 Benth. Fl. Austr. IV. 421 ; Clarke in Hook. f. Flor. Brit. Ind. IV. 298; 

 HalHer f. Engl. Bot. Jahrb. XVI. 554. I. littoralis, Bl. Bijdr. 713 

 Thw. Enum. 211 {not of Boiss.). I. subdentata, Miq. Fl. Ind. Bat. II. 

 614. L cymosa, Bak. Fl. Maurit. 208 {not of Eoem. & Schult.). I. 



