450 LXix. RUBiACE.c. [OldenlancUa 



after cultivation, between Ambriz and Mubango, near the river Loge, 

 rather scarce ; fl. and fr. July 1854. Also in plantations of Manihot 

 utilimma in Loan ha, Nov. 1859. No. 3079. 



PuNGO Andongo. — A decumbent, apparently annual herb, rooting 

 at the nodes, with a Violaceous habit, and whitish flowers. By springs 

 in Funda Quilombo, within the prfesidium ; fl. and fr. Jan. 1867. 

 No. 3078. 



28. 0. macrophyUa DC. Prodr. iv. p. 427 (1830); Hieru,Z.c.,p. 63. 

 Ambriz. — At a rivulet near the town, close to the springs, rare ; fl. 



Nov. 1854. No. 3069. 



Bakra do Dande. — An annual prostrate herb, with pale-blue 

 flowers. In damp places at the banks of the river Dande near its 

 mouth, here and there ; fl. and fr. Sept. 1858. No. 3070. 



Barra do Bengo. — In moist places at the river Bengo near 

 Quifandango, sporadic ; fr. and few fl. Dec. 1 853. In damp places at 

 the river Bengo, rather rare ; fl. and fr. .Jan. 1854. No. 3072. 



GoLUNGO Alto. — A glaucescent, prostrate-ascending, annual herb, 

 with milk-white flowers. At the grassy banks of the river Casabala in 

 Sobato de Bumba, not very abundant ; fl. and fr. Dec. 1855. No. 3068- 



Am BACA. — An annual marsh herb, with milk-white somewhat 

 bluish flowers. In swamps at the banks of the river Lucala : fl. middle 

 of Oct. 1856. No. 3071. 



The following No. should be compared with this species : — 



HuiLLA. — In herbaceous places at the borders of the forest near 

 Catumba. A young plant without either fl. or fr. Jan. 1860. No. 5345. 



29. 0. ramosissima Hohen. ex Walp. Rep. ii. p. 502 (1843). 

 0. hedi/otoides'Boiss. Fl. Orient, iii. p. 11 (1875) ; Hiern, I.e., p. 64. 

 LiBONGO. — An annual, rather rigid, divaricately branched, little 



herb, with a Lythraceous habit ; stem and branches angular ; leaves 

 opposite, linear-lanceolate, spreading, bright-green : stipules shortly 

 sheathing, 2- or 3-toothed ; calyx-segments 10, erect-spreading or 

 patent ; corolla whitish (only one seen) ; ovary campanulate, 2-celled ; 

 cells many-ovuled ; seeds numerous, angular, very small. In exposed 

 situations on a black sandy soil at the banks of the river Lifune near 

 Banza de Libongo ; fr. end of Sept. 1858. No. 3062. 



The following No., with solitary flowers in the axils, is perhaps 

 a variety of this species : — 



MossAMEDES. — A rather small, prostrate, annual herb ; branches 

 several ; stems purplish, ascending ; leaves linear ; flowers rather 

 small, white. In damp sandy places at the banks of the river Bero 

 and about its mouth ; fl. and fr. end of July and in August 1859. 

 No. 3048. 



30. 0. nervosa Hiem, sp. n. 



An annual, ascending or erect, glabrous, glaucescent herb, 2| 

 to 4 ft. high ; stem acutely quadrangular, the angles membranous- 

 winged ; leaves ovate or lanceolate, acuminate, acute at the apex, 

 more or less wedge-shaped at the base, membranous, flaccid, bright- 

 green above, paler beneath, with sevei-al very prominent veins, 

 1 to 3| in. long by -J- to 1^ in. broad; petioles ranging up to ^ in. 

 long, slender, usually .spreading; stipules truncate, multi-setose; 

 flowers about J^ in. long, tetramerous, terminal and in the 

 upper axils, arranged in compound loosely-branched cymes of i to. 



