384 -A- FLORA OP MANILA 



Rather commonly cultivated, frequently spontaneous, fl. all the year; 

 widely distributed in the Philippines and thoroughly naturalized. A native 

 of tropical America, now found in many other tropical and warm countries, 

 cultivated or wild. 



4. CALONYCTION Choisy 



Large, herbaceous, twining vines, the stems usually muricate. Leaves 

 large, cordate, entire or angled. Flowers solitary or in few-flowered cymes. 

 Sepals 5, smooth, usually prominently awned, the outer ones sometimes 

 smaller than the inner. Corolla large, salver-shaped, usually pure-white, 

 the tube narrow-cylindric, the limb plicate. Ovary 2-celled, cells 2-ovuled; 

 style filiform. Stamens 5, somewhat exserted. Capsule 4-valved, 4-seeded. 

 (Greek "beautiful" and "night" alluding to the large flowers which open at 

 night.) 



Species 6 or 7 all or mostly in tropical America, 2 or 3 now wide-spread 

 in the tropics of the Old World. 



Sepals prominently awned; stems usually muricate 1. C. acMeatum 



Sepals obtuse, not avmed or only slightly apiculate; stems glabrous. 



2. C. album 



1. C. ACULBATUM (L.) House. (C. hona^nox Boj.). Moon Flower. 



An extensively climbing, twining, glabrous, vine, reaching a length of 

 10 m or more. Stems green, more or less muricate, or nearly smooth. 

 Leaves ovate, entire or somewhat angled or lobed, sharply acuminate, base 

 cordate, 14 to 20 cm long. Peduncles axillary, solitary, long, 1- to B-flowered. 

 Sepals in flower green, ovate, long-awned, about 2 cm long. Corolla-tube 

 greenish-white, 8 to 10 cm long, about 6 mm in diameter, the limb spreading, 

 about 15 cm in diameter, white, the plaits greenish. Fruit ovoid, pointed, 

 about 3 cm long, surrounded at the base by the accrescent sepals, the ped- 

 icels much-thickened. (Fl. Filip. pi. 332.) 



Occasional in thickets, fl. Aug.-March; widely distributed in the Philip- 

 pines, throughly naturalized. A native of tropical America, now widely 

 distributed in the tropics in cultivation and as a nauralized plant. The 

 flowers open at night only and close shortly after dawn. 



2. C. ALBUM (L.) House. 



A scandent, somewhat woody, twining vine of indefinite length, glabrous, 

 stems smooth or sometimes muricate. Leaves orbicular-ovate, entire, acu- 

 minate, base prominently cordate, 9 to 18 cm long. Peduncles axillary, 

 short or somewhat elongated, 1- to 3-flowered. Sepals green, orbicular- 

 ovate, imbricate, 1.5 to 2 cm long, rounded,, sometimes minutely apiculate, 

 enlarged in fruit. Corolla white, the tube cylindric, about 6 cm long, 8 

 mm in diameter, the limb spreading. Capsule globose, about 2 cm in 

 diameter. 



In thickets, Pasay, Tondo, etc., occasional, fl. Oct.-Jan.; not common in 

 the Philippines. Tropics of both hemispheres. 



5. OPERCULINA Manso 



Large herbaceous climbers, the stems, peduncles, and petioles usually 

 winged. Leaves large, entire or palmately lobed. Flowers large, axillary, 

 solitary or in few-flowered cymes. Sepals 5, large, accrescent in fruit. 

 Corolla campanulate, the tube with 5 vertical, smooth bands. Stamens 5; 

 filaments filiform. Ovary 2-celled, 4-ovuled. Fruit a capsule enclosed by 



