118 CONVOLVULACEJE. [IpoMiEA. 



flowers. It is largely used to form a screen on trellig-work. It is a 

 Mexican species of rather recent introduction into India. 



12. CALONYCTION, Choisy. 



Under Ipom-ea in Fl. Bbit. Ind. 



Large herbaceous climbers ; stems usually muricate. Leaves 

 lerge, cordate, entire or angled Flowers solitary or in few-flowered 

 axillary cymes, bracts caducous. Sepals herbaceous, smooth, usually 

 aristate, subequal or the outer smaller. Corolla large, salver-shaped, 

 white or rose-purple, glabrous ; tube narrow, much longer than the 

 calyx, limb plicate. Stamens exserted. Ovary 2-celled and 4- 

 ovuled, style filiform, stigma 2-globose. Fruit a 4-valved capsale. 

 Seeds 4, dull, glabrous. — Species 6 or 7, in Trop. America, two of 

 which are subspontaneous throughout the tropics. 



Corolla white, stamens exserted, seeds yellow 1. C. Bona'nox. 

 Corolla rose-purple, stamens included, seeds 

 black . . . . . . . 2. C. muricatum. 



1. C. Bona-nox, Boj- Sort. Maurit. 227; Prain Beng.Pl. 738. 0. 



speciosum. Chois. ; Cooke Fl. Bomb. ii. 252 Ipomaea grandiflora, Roxb. 



Fl. Ind. i. 497 ; (not of Lamk) I. Bona-nox, var. grandiflora F. B. I. iv, 197 ; 



Watt. E. D.; Kanjilal For. Fl. 252 ; Gamble Man. Ind. Timb. 507. (Moon 



flower.) 



A large scandent twiner. Sterns often muricate or almost prickly. 

 Leaves 3-7 in.long, broadly ovate, acute entire or occasionally lobed, 

 glabrous, thin, base deeply cordate and with rounded auricles, 

 petioles about as long as the leaves.^ Peduncles 2-6 in. long, 1-5 

 flowered ; pedicels short, stout. Sepals % in. long, ovate, the 3 outer ones 

 abruptly aristate. Corolla white with sometimes greenish bands ; 

 tube linear, 3-3£ in. long, glabrous within, limb 3-5 in. across. 

 Stamens exserted. Capsule ovoid -oblong, about 1 in. long, narrowed 

 upwards. Seeds % in long, glabrous, polished, yellow. 



Apparently wild in many places within the area, but found chiefly near 

 habitafions. The flowers expond in the evening and close to wither 

 on the following morning. Distrib. Throughout the warmer parts of 

 India, also in Ceylon, extending to all tropical countries and often 

 cultivated. All parts of the plant are used medicinally. 



2. C. muricatum, G. Don Gen. Syst. iv, 264, Prain Beng. PI. 738.; 

 Coohe Fl. Bomb. ii. 253. Ipomaea muricata, Jacq. ; Roxb. Fl. Ind. 

 i, 499 ; F. B. I. iv, 197; Watt E.D.; Collett Fl. Siml. 336. 



A climbing twiner. Stems often muricate. Leaves 3-6 in. long, broadly 

 ovate, entire, glabrous, base deeply cordate and with rounded auricles, 

 petioles about as long as the leaves. Peduncles 1-5-flowered, varying in 



