Hygrophila.'] xcviii. acanthace^ (burkill). 35 



broader. Corolla-tube 4 lin. long; lips o-4 lin. long, slightly hairy 

 outside. Stamens unequal ; filaments of the lower longer pair broadened, 

 slightly hairy. Style hairy. Capsule 4 lin. long, many-seeded. — 

 Polyechma cceruleurrij Hochst. in Flora, 1841, o77 ; Nees in DC. Prod, 

 xi. 82. 



N-lle land. Kordofan : Gebel el Glet, Pfund, 98 ! Om Cherene, Pf'and, 156 ! 

 White Nile : near Mount Mussa, Kotschy, 310 ! at El-Ehs, Schivdnfurth, 970 ! Bahr- 

 el-Abiad, d'Arnaud (ex Nees). 



12. H. micrantha, T. Anders, hi Journ. Linn. Soc. vii. 22. 

 Spreading plant, much branched; stems hispid with spreading hairs. 

 Upper leaves oblong, obtuse, sessile, 1 in. or so long, entire. Flowers 

 in whorls at the nodes, the one half of the whorl (i.e. the small inflor- 

 escence from the axil of one leaf) 1-few-flowered, the other half 

 3-several-flowered ; bracts oblong-lanceolate, obtuse, petiolate, equalling 

 the calyx; bracteoles small, subulate. Calyx only divided into equal 

 segments to a little below the middle, hirsute. Corolla white, slightly 

 exceeding the calyx; lower lip not rugose-plicate. Capsule lG-20- 

 seeded. — Polyechma micranthum^ Nees in DC. Prod. xi. 88. 



Upper Guinea. Senegal, Perrottet, 477, 32. Kunth (ex Nees). Senegambia, 

 Dagana, Leprieur ! 



Habit in general of H. ccerulea; to this species it certainly is most nearly allied. 



13. H. ciliata, Burkill. Stem erect, quadrangular, glabrous. 

 Leaves ovate, sessile, regularly serrate, glabrous, \\ in. long, J in. wide, 

 with 10-12 veins arising from each side of the midrib. Inflorescences 

 1-3-flowered cymes arising singly from the nodes. Calyx-lobes 

 linear, fringed with hairs along the margins ; dorsal lobe exceeding 

 the others, 3 J lin. long. Corolla pubescent outside ; tube about 3 Hn. 

 long ; upper lip 2 lin. long ; lower a little longer. Stamens nearly 

 equal ; filaments of the lower pair broad and with a few hairs. Ovary 

 pubescent, with 35-40 ovules. — Nomaphila ciliata, T. Anders, in Journ. 

 Linn. Soc. vii. 21. 



lower Guinea. Congo, /Smith, 13 ! 



14. H. pilosa, Burkill. Stems rather slender, obscurely angled, 

 somewhat pilose. Leaves linear-lanceolate, sessile, entire, tapering to 

 both ends, pilose when young, 2 in. long and J in. wide. Flowers 

 solitary, or two together, borne on rather long peduncles, a pair of 

 which arise from each node. Calyx-segments pilose, the upper linear- 

 lanceolate, 4 lin. long ; the others linear, 3 lin. long. Corolla slightly 

 pilose outside ; tube 3 lin. long ; upper lip 21 lin. long ; lower a 

 little longer and marked with orange spots. Stamens nearly equal ; 

 filaments of the lower pair broad, almost glabrous. Ovary pubescent, 

 with about 20 ovules. 



Mozamb. Bist. British Central Africa: Nyasaland ; Fort Hill, 3500-4000 ft., 

 Wkyte! North Zambesia ; Batoka Highlands, 3000 ft., Klr/c ! 



15. H. linearis, Burkill. Stem weak, ascending, about 18 in. long, 

 rooting at the base, glabrous. Leaves linear, sessile, glabrous, entire, 



