﻿Tpomoea,] convolvulace^ (Baker & Wright). 61 



Eastern Region : Natal ; a specimen cultivated in Durban Botanical 

 Gardens, raised from seeds received from Mrs. Catherine Saunders. Wood. 

 1635 ! 



This is the only South African species belonging to the section Operculina, 

 which was established as a genus by Manso and retained by Meissner and Hallier, 

 on account of tlie anthers being spirally twisted and the capsule having a. lid 

 which falls off when ripe. 



36. I. lambtoniana (Rendle in Journ. Bot. 1901, 16) ; stems 

 firm, slender, twining or trailing, thinly clothed with shore bristly 

 hairs ; leaves ovate, acute, entire, deeply cordate at the base, l}- 2 in. 

 long, firm in texture, green and jjlabrous above when mature, slightly 

 hispid only on the main veins beneath ; veins and veinlets raised ; 

 petiole very short ; peduncles always 1-flowered, shorter than the 

 leaves, articulated at the base ; bracts minute, linear, a short 

 distance from the calyx ; pedicel very short ; calyx 6 lin. long, 

 thinly hispid all over; sepals lanceolate, acute, subequal, firm in 

 texture, 3 inner rather larger than the 2 outer ; corolla bright purple, 

 broadly funnel-shaped, more than twice the length of the calyx ; 

 dilated at the throat, glabrous down the back of the divisions ; 

 capsule unknown. 



Eastern Region : Natal ; near Ladysraith, Gerrard, 622 ! 



37. I. bathycolpos (Hallier f. in Engl. Jahrb. xviii. 144) ; stems 

 slender, twining or trailing, scabrous with rough raised points ; 

 leaves roundish, obtuse, with a minute cusp, entire, deeply cordate 

 at the base, 1-1^ in. long and broad, subcoriaceous, glabrous on 

 both sides, basal sinus wide, lobes incurved ; peduncles always 

 1-flowered, equalling or exceeding the leaves, scabrous; bracts 

 minute, lanceolate ; pedicel very short ; calyx 6-9 lin. long, glabrous, 

 scabrous ; sepals oblong, obtuse, chartaceous, much imbricate, the 

 outer often shorter than the others ; corolla white, broadly funnel- 

 shaped, spreading at the throat, 2 in. long, glabrous down the b«ck 

 of the divisions ; capsule unknown. Hallier f. in Bull. Herb. Boiss. 

 vii. 52 ; Rendle in Journ. Bot. 1902, 191. 



Var. /8, sinuatodentata (Hallier f. in Bull. Herb. Boiss. vii. 53); leaves 

 rotundate, up to 2 in. in diam., with large irregular teeth, basal sinus narrower 

 and lobes wider than in the type. 



Kalahari Region : Orange River Colony ; by the Vaal River, Mrs. Barber 

 and Mrs. Bowker, 661 ! Leeuw Spruit and Vredefort, Barrett- Hamilton ! Trans, 

 vaal; Aapies Poort, Rehmann, 4134, Wonderboom Poort, Rehmann, 4536, 

 Makapans Berg at Stryd Poort, Rehmann, 5406 (all ex Hallier f.) ; Magalies 

 Berg, Burke, 175! Zeyher, 1218! Klip River, Xelson, 221! Jeppestown 

 Ridges, 6000 ft., Qilfillan in Herb. Galpin, 6236! Var. /3 : Transvaal; near 

 Lydenburg, Wilms, 988 ! 



38. I. cardiosepala (Hochst. ex Choisy in DC. Prod. ix. 429) ; 

 stems very slender, wide-climbing, clothed at first with a few fine 

 spreading hairs ; leaves ovate, acute, entire, deeply cordate at the 

 base, 2-3 in. long, membranous, green, and glabrous on both sides or 

 sparingly pilose beneath ; petiole nearly as long as the blade ; cymes 



