— Trapa. TETRANDRIA MONOGYNIAs 449 
A native of such places as the last described, it is considerably 
smaller than that species, but more branchy. i 
Stems as in A. pentandra.— Leaves opposite, sessile, wedge-form- 
ed, smooth, entire.— Flowers axillary, solitary, sessile. 
TRAPA. Schreb. Gen. N. 208. 
Calyx four-parted, or four-leaved.  Corol four-petaled. Germ 
inferior, two-celled ; cells from one to two-seeded, attachment of the 
ovulum superior. Nut turbinate, armed with two or four horns, 
(which were the leaflets of the calyx.) Embryo simple, lodged in 
lie apex of the ample perisperm. ! 2 
1. T. bicornis. : 
— Nuts with two, opposite, recurved, very obtuse horns. 
Chin. Lin-ko. MEX x 
A native of China, where it is carefully cultivated in lakes, ponds | 
and other receptacles of water. 
9. T. bispinosa, R. 
Nut with two opposite, straight, barbed, spinous horns. Nectary 
cup-shaped, curled. 
Shringata, Asiat. Res. vol. iii. p. 253. 
Sans. IRT: Sringata, FARUWAs, Julukuntuka. 
` Beng. Panee-phul. Singhara. . 
= Panover-tsjerana, Rheed. Hort. Mal. vol. xi. p. 64. t. 33. (evi- 
dently intended for this plant, and not T. natans.) 
. Found floating on sweet, standing water in Bengal and many 
: other parts of India. Flowering time the rainy season. 
Root consisting of numerous, simple, capillary fibres which issue 
finis the under margins of the cicatrices of the fallen leaves.—Stems 
stoloniferous, often several feet long, floating. — Leaves petioled, al- 
ternate, approximate round the apex of the shoots, of a rhomboidal- 
reniform shape; with the posterior margins entire, and the anterior 
/ enes serrate-dentate, smooth above, of a deep green, villous and purs 
Eee , 
