490 lix. onagrarieje (oliver). [Jussiaa. 



entire, 1-3 in. long*; petiole variable, frequently narrowly margined to 

 the base. Flowers small, yellow, sessile, 4-merous, often from nearly 

 every axil. Capsule cylindrical or slightly narrowed below, J— § in. 

 long. Seeds minute, oblong or ellipsoidal, about ^ line in length. — 

 J. altissima, Guill. et Perr. Fl. Seneg. 293 (ex. descr.). J. nubica, Hochst. 

 in Herb. Kotsch. Nub. 



Upper Guinea. Quorra, T. Voget! Senegambia, Guill. et Perr., I.e. 

 Nile Land. Between Khartoum and Sehendy, Dr. Bromfield! Nubia, Sennaar, 

 Kotschy ! 



Lower Guinea. Congo, Consul Burton ! 



Mozamb. Distr. Sungomero, Zanzibar, Speke and Grant ! 



Also in Tropical America. 



3. LUDWIGIA, Linn. ; Benth. et Hook. f. Gen. Plant, i. 7§8. 



Characters of Jussiaa, but flowers isostemonous, the stamens same 

 number as calyx-teeth. — Herbs, the African species with habit of 

 Jussicea. 



A considerable genus, chiefly North American, with a few widely-diffused species in 

 the Old World tropics. 



Flowers 4-1 in. diameter. Capsule 1 in. long, ^ in. diameter . . 1. L.jussiceoides. 

 Flowers |-| in. diameter. Capsule £-4 in. loug, -j^-fa in. diameter, 



narrowed into peduncle of ^ in 2. L. parviflora. 



Flowers <t-| in. diameter. Capsule slender, subsessile, 4~f in. long, 



•^ in. diameter 3. L.prostrata. 



1. L. jussiseoid.es, Lam.; DC. Prod. iii. 58. Erect, varying in 

 height to probably 2-3 ft., freely branched above. Stem subteretej 

 with faintly raised decurrent lines, puberulous at the extremities. 

 Leaves linear-oval or -lanceolate acute or subacute, narrowed below 

 into the petiole, glabrous or scabrid on the nerves ; blade and vari- 

 able petiole together 1J-4 in. long. Flowers axillary, 1 in. or less 

 in diameter. Calyx-teeth J-J in. ; petals rotundate, exceeding the 

 calyx-teeth. Capsule subcylindrical, 1 in. long, ^ in. diameter on 

 peduncle of J in., .more or less. — DC. Mem. Onagr. t. 3. 



Mozamb. Distr. Zanzibar, Dr. Kirk! 

 Also in the Mascarene Islands. 



2. L. parviflora, Uoxb. ; DC. Prod. iii. 59. Erect, freely branch- 

 ing or subsimple, from a few inches to 2-3 ft. in height, wholly gla- 

 brous or with a few microscopic setulae on the leaf-nerves. Stem sub- 

 terete below, with decurrent lines. LeaVes from narrow-linear to 

 linear-lanceolate, gradually narrowed into the petiole, 1-3 (4) in. long. 

 Flowers axillary, \ in. or less in diameter. Calyx-teeth |-£ in. Cap- 

 sule narrowed below, \— \ in. long, T V~6 m - diameter above, usually 

 with a distinct peduncle of -^ in. Seeds l-50th to l-60th in. long. 

 — Isnardia multi/tora, Guill. et Perr. Fl. Seneg. i. 295 (ex. descr.). Lud- 

 wigia, Walp. Rep. ii. 75. 



Upper Guinea. Senegambia, Guill. et Perr. (with flowers occasionally 5-merous, 

 and stamens sometimes twice as many as usual). 

 Nile It and. Unyoro, Speke and Grant I 

 Also in Tropical Asia and Australia. 



