Iudwigia.] LIX. ONAGRARIEE (OLIVER). 491 
5. L. prostrata, foxb.; DC. Prod. iii. 59. Diffuse ascending or 
erect, glabrous ; stem somewhat angular. Leaves lanceolate or linear- 
lanceolate, acuminate, 2-4 in. long, narrowed at base into petiole of 
t in. more or less, sometimes minutely setulose-ciliate. Flowers small, 
¢~4 in. in diameter ; petals oval or lanceolate. Capsule tetragonous 
longitudinally grooved, subsessile, }—1 in. long, 120th in. in diameter. 
Seeds about 1-30th in. long.—ZL. dijfusa, Ham. in Linn. Trans. xiv. 301. 
= ey Land. Abyssinia, Dillon. (L. abyssinica, A. Rich. Fl. Abyss. i. 274 (ex. 
escr. 
Mozamb. Distr. Moramballa, 3000 ft. alt., Dr. Kirk. 
Occurs in India and the Mascarene group. if 
_M. De Candolle based his genus Priewrea (P. senegalensis) on a Lndwigia or Jus- 
si@a, with flowers frequently 3-merous, collected by Leprieur in Senegambia (Mém. 
Onagr. 14, t. 2). Guillemin and Perrottet reduce it to Jussieu with doubt. I have 
not seen a specimen. From the figure and description it would appear not improbably 
a state of Jussiwa linifolia, 
4. TRAPA, Linn.; Benth. et Hook. f. Gen. Plant. i. 793. 
Floating herbs. Calyx-limb 4-partite, segments persistent accres- 
cent, often spinescent. Petals 4, inserted at base of an epigynous 
disk. Stamens 4. Ovary 2-celled, upper free portion conical, nar- 
rowed into the style; stigma capitate; ovules solitary, pendulous. 
tuit turbinate, bony or coriaceous, horned with 2 or 4 of the persistent 
calyx-teeth, 1-celled, 1-seeded. Cotyledons very unequal, radicle in- 
curved, penetrating the apex of the fruit on germination.—Leaves 
dimorphic ; submersed root-like, pinnatipartite with filiform segments ; 
emersed rosulate rhomboidal dentate on outer margins, petiolate; pe- 
tole dilated below the lamina. 
A small genus extending eastward through Asia from Central Europe. The farina- 
Ceous seeds are collected as food. 
Nuts woveped. eaves plabresoent =, . 5 4. «css Fb ede natans. 
uts 2-horned. Leaves tomentose beneath. . . . . . - - - 2 T. bispinosa. 
1. T. natans, Linn. ; DC. Prod. iii. 63, Rosulate leaves varying 
usually from 1-2 in. in breadth, base broadly cuneate, outer margins 
®ntate or inciso-dentate, glabrous above, glabrescent or papillose- 
tomentose on the nerves beneath; petioles glabrescent. Nuts with 
4 short broad-based cusps or horns; 1 in. broad more or less. 
Nile Land. Upper Nile, 2° N. lat. Speke and Grant! 
Also in Central Europe and Temperate Asia. 
ey bispinosa, Roxb.; DC. Prod. iii. 64. Similar to the fore- 
pong. Leaves varying to nearly 3 in. in breadth, generally more or 
€ss uniformly appressed-tomentose beneath as are the petioles. Nuts 
with 2 slender patent lateral horns, the intermediate teeth undeveloped 
. Scarcely prominent, apex shortly apiculate with the persistent style- 
se. 
Mozamb. Distr. Zambesi, floating down in large quantities by the Shire in flood, 
and Luabo, Dr, Kirk! 
in India. 
