452 
‘GENUS I. TRAPA. 
Wetrandria Monogynia. Ser: Syst: 
Deriv. Abridged from Calcitrapa, the Latin name of an instru- 
ment furnished with spines. The fruit of some of the species is 
furnished with 4 spines. 
_ Gen. Cuar. Herbaceots floating plants with fibrous roots: 
‘lowest leaves opposite and divided into capillary segments: upper 
ones crowded, deltoid, toothed: petiole swollen im the middle: 
flowers axillary: calyx-tube cohering with the ovary: limb 4-par- 
dite: petals 4: ovary 2-celled, surmounted by a cup-shaped appen- 
‘age : ovules solitary, pendulous: stigma capitate : nut indehiscent, 
very hard, turbinate, crowned with 2-4 homs, I-celled: seed 
solitary. 
(1) T.srsprvosa, (Roxb. ) 
Ydent. Roxb. fi. Ind. I. p. 428.—W. & A. prod. I. p. 337.— 
Dec. prod. III. p. 64. 
Engrav. Roxb. Cor. TIL. t, 234.—Rheede Mal. XI. t. 33. 
Srrc. Cuan. Upper leaves and petioles tomentose beneath: pe- 
duncles shorter than the petioles: calyx villous; crown of the ovary 
8-furrowed, the margins curled: horns of the fruit 2, conical, very 
sharp, barbed batkwards: ‘flowers smallish, white. 
Peninsula. Northern India. Flowering in May and June. The 
fruit, known as the Singhara. nut, is eaten by the natives. 
(2) T. auaprisrinosaA. (Roxb.) 
Ident. Roxb. fi. Ind. I. p. 480. 
Srrc. Cuan. Nut with two opposite pairs of straight acute 
spinous horns. 
Silhet, floating on lakes and pools of fresh water. 
GENUS I. SERPICULA. 
Moneela Tetrandria. Sez: Syst: 
Deriv. From Serpo, ‘to creep, alluding to the habits of the 
plants. 
Gey. Cuan. Mare rrowers: Calyx 4-partite: petals 4: sta- 
mens 4 or 8: styles sterile, in the centre of the flower. Frm. 
FLowERS: Calyx-tube cohering with the ovary: limb 4-partite: 
‘petals -and stamens wanting: ovary 4-celled:. ovules 4: styles 
spreading, each terminated by a large pappulose stigma: nut brittle, 
1-celled, 1-seeded. 
