232 Onagracece. {Jussicea. 



brous, segm. broadly triangular, acute; pet. connate by their 

 tips and falling on expansion of fl. ; stam. erect, anth. almost 

 sessile ; capsule about 1 in., ovoid, woody, blackish-brown ; 

 seed with oblong obtuse wing, nearly 1 in. 



Moist low country in forest below 1500 ft.; rare. Raitunwelle; 

 Ambagamuwa (Thwaites) ; Udagama (Ferguson) ; Nillowe Kande ; Kuru- 

 wita Korale. Fl. Feb.-June ; yellowish-green, pet. white. 



Endemic. 



The flowers have a very disagreeable odour. 



A very remarkable plant ; the leaves have much resemblance to those 

 of Memecylon Hookeri. 



LV.— ONAGRACE^E. 



Herbs, 1. opp. or alt, with or without stip., fl. axillary, regular, 

 bisexual ; cal.-tube adnate to whole or half of ov., segm. 4 or 

 5; pet. 4 or 5 ; stam. equal to or double the number of pet., 

 epigynous; ov. inferior or half-inferior, 4-5-celled, with 

 numerous ovules, or 2-celled with a solitary ovule in each 

 cell, style simple; fruit a membranous capsule or a hard in- 

 dehiscent nut; seeds without endosperm. 



Seeds very numerous. 



Stam. 8 or 10 I. Jtjssi^ea. 



Stam. 4 2. LUDWIGIA. 



Seed solitary 3. TRAPA. 



Our few species are all low-country plants, mostly in wet places. 

 Trap a is completely aquatic. 



1. JUSSI2EA, L. 



Herbaceous or semi-shrubby perennials, 1. alt, entire, fl. 

 axillary, solitary; cal.-tube completely adnate to ov., and not 

 produced beyond it, segm. 4 or 5 ; pet. 4 or 5 ; stam. 8 or 10, 

 epigynous; ov. inferior, 4- or 5-celled, with very numerous 

 ovules in each cell, style very short, stigma large; fruit a 

 capsule, irregularly dehiscent between the vertical ribs; seeds 

 very numerous. — Sp. 30; 2 in Fl. B. Ind. 



Stems creeping or floating; pet. 5 . . . . 1. J. REPENS. 

 Stems erect ; pet. 4 2. J. SUFFRUTICOSA. 



