6 FLORA OF MADRAS. [Pongamia. 



streams and rivers in most Districts, in the hills up to 3,000 ft. 

 Often planted in gardens and avenues. 



A moderate-sized nearly evergreen tree with 5 or more rather 

 large ovate acuminate leaflets and pinkish- white flowers. 

 Bark thick, greyish-brown, tubercled ; wood white, moder- 

 ately hard, used for cart-wheels and other purposes. The 

 seeds give an oil, used for burning and in medicine. Yern. 

 Hind. Karanj ; Ur. Koranju; Tel. Ka,nuga; Tarn. Ponga. 



56. Derris, Lour. 



Climbing shrubs, rarely erect trees. Leaves alternate, impari- 

 pinnate; leaflets opposite; stipules small; stipels usually 0. 

 Flowers in fascicles, rarely solitary, on the rhachis of axillary or 

 terminal racemes or panicles ; bracts small, caducous ; bracteoles 

 ovate or orbicular, small, often caducous. Calyx-tube cam- 

 panulate, nearly truncate ; teeth very short. Corolla much 

 exserted ; standard obovate or orbicular, broad, not auricled 

 and rarely callose ; wings obliquely oblong, often spurred above 

 the long claw, slightly adnate to the incurved obtuse keel. 

 Stamens usually monadelphous, the vexillary filament free below, 

 rarely quite free ; anthers uniform, versatile. Ovary sessile or 

 shortly stipitate, few-ovuled ; style incurved ; stigma capitate. 

 Pod usually thin, sometimes thickened, indehiscent, oblong or 

 obliquely orbicular, winged along the upper or both sutures. Seeds 

 solitary or few, compressed, reniforin or orbicular; hilum small. 



Pod winged along the upper suture only : 



Pod narrow, ligulate, acute at both ends, up to 4 in. long and 

 5-seeded ; leaflets many, elliptic-oblong, oblong-lanceolate or the 

 end one obovate or oblanceolate, coriaceous, shining above, 1-2 in. 



long 1. scandens. 



Pod broad, obliquely ovate or orbicular, obtuse at both ends, 

 1-1*5 in. long, 1 in. broad, 1-2-seeded ; leaflets usually 5-7, ovate, 



acuminate, subcoriaceous, dull, 2'5-4 in. long 2. uliginosa 



Pod winged on both sutures : 



Wings of pod narrow, the pods more or less flattened : 

 Pods usually pointed at both ends : 



Pods glabrous, 1-3-seeded, up to 3*5 in. long, 1 in. broad, the 

 tip hooked; leaflets oblong- lanceolate or -oblanceolate, up to 



4 in. long, '5-l'5 in. broad 3, canarensis. 



Pods ferruginous-tomentose, 1-2 in. long, '5-'6 in. broad, the 



