Ludwigia. tetrandria monogynia. 419 



4. F. nilida. Roxb. 



Shrubby. Branchlets, petioles and ribs armed. Leaflets 

 two or three pairs, with a terminal odd one, oblong, lucid, 

 remotely gland-crenate, apex rather long and emarginate. 

 Racemes axillary. 



Tcheum-tsew of the Chinese. 



Introduced from Canton into the Botanic garden by Mr. 

 W. Kerr in 1S12, and in January of the following 1 year one 

 cf the plants blossomed abundantly. 



The flowers as in the other species, but the pistillum is 

 three or four-lobed, each appearing to end in a recurved 

 style with a two-lobed stigma. The shrub, therefore, ap- 

 proaches nearer than any of the preceding species to Zan- 

 thoxylon. 



LUDWIGIA. Schreb. gen. N. 204. 

 Calyx four-parted. Corol four-petalled. Capsule inferior, 

 four-sided, four-celled. Seeds numerous. 



1. L. parviflora. R. 



Annual, branches diffuse. Leaves alternate, lanceolate, 

 short-petioled, smooth. Flowers axillary, sessile. Capsule 

 linear, obsoletely four-sided. 



A small, ramous plant, a native of Bengal ; flowering time 

 the rainy season ; seed ripe about October. 



Root ramous, annual. Stem short, round, in young plants 

 erect. Branches many, diffuse, slightly striated ; the whole 

 plant of a dark-ferruginous colour. Leaves alternate, short- 

 petioled, lanceolate, entire, smooth, length from one to three 

 inches. Flowers axillary, small, sessile. The leaves about 

 the ends of the branches are so small and crowded, as to make 

 the extremities of the branchlets appear like leafy spikes. 

 Bractes, a most minute one on each side of the insertion of 

 each flower. Calyx, the divisions taper to most acute points, 

 and equal the oblong petals. Capsule beneath, linear, obso- 



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