36 XOVIII. ACANTHACEH (BURKILL). | Hygrophila. 
acute at the apex, 3 in. long, 1-14 lin. wide. Inflorescences of 1-2- 
flowered cymes arising singly from the upper nodes. Flowers on pedicels 
about 1 lin. long. Calyx-teeth linear, acute, nearly equal, glabrous. 
Corolla scarcely 2 lin. long. Ovary with about 14 ovules. 
Lower Guinea. Angola, Welwitsch, 5772! 
16. H. gracillima, Burkill. Stem stout, much branched at the 
base, glabrous, obscurely angled in the thinner branches. Leaves 
linear-lanceolate, sessile, scabrid on both surfaces, acute or subacute 
above, rounded below, upwards of 1 in. long, 14 lin. broad. Flowers 
solitary or 2 together in small cymes arising singly from the nodes. 
Calyx-teeth linear, scabrid; the upper 5 lin. long, 4 lin. broad, the 
others 4 lin. long. Corolla-tube 4-5 lin. long, somewhat pubescent 
outside ; upper lip 3 lin., lower 4 lin. long, with 2 yellow marks on the 
palate. Stamens nearly equal; filaments of the lower pair sparingly 
hairy. Ovary pubescent. Capsule somewhat pubescent, 4—5 lin. long, 
containing 35-40 seeds.—Nomaphila gracillima, Schinz in Verhandl. 
bot. Ver. Brandenburg, 1889, 196. 
Lower Guinea. Amboland: Olukonda, common on moist land and in grass by 
water, Schinz, 7! 8! 18! 
_ 17. H. levis, Lindau in Engl. and Prantl, Pflanzenfam. iv. 3 B, 
297. Stem erect, bluntly angled, clad with very short hairs, Leaves 
narrowly lanceolate, sessile, entire, acute above, somewhat rounded 
below, when young clad like the stem with very short hairs, becoming 
glabrous later, 24 in. long, 4 in. broad. Inflorescences arising as 3-7- 
flowered cymes for the most part singly at the nodes. Calyx-teeth 
linear, acute, glandular-pubescent, the posterior nearly } in. long, 4 lin. 
broad, the others 4 lin. long. Corolla pink ; tube 3-4 lin. long, pubes- 
cent outside. Stamens nearly equal ; filaments of the lower pair fringed, 
especially on the lower side, with short, stiff hairs. Ovary pubescent, 
with about 10 ovules. Capsule 5 lin. long, glabrous.— Womaphila levis, 
T. Anders. in Journ. Linn. Soe. vii. 21. 
Upper Guinea. Senegambia, Heudelot,197! Niger Territory : Nupe, swampy 
margins of streams, Barter, 1139! 1285! 
18. Ht. Gigas, Burkill. Stem 4-5 ft. high, pubescent, obscurely 
angled in the upper part. Leaves narrowly lanceolate, entire, tapering 
to both ends, pubescent, the upper 3} in. long and } in. wide. Flowers 
on 2—3-flowered cymes arising singly from the nodes. Calyx glandular- 
pubescent ; lobes linear-subulate, 4, or in the dorsal sepal 5 lin., long, 
arising from a basal cup 1 lin. deep. Corolla pubescent outside ; tube 
8 lin. long, much dilated above; upper lip 7 lin. long; lower slightly 
longer and with long hairs on the palate. Stamens with filaments of 
different length, those of the lower pair hardly broadened, glabrous. 
Ovary with 12-14 ovules. 
Mozamb. Dist. British Central Africa: Fort Young, in a damp district. 
Nicholson ! 
Perhaps Brillantaisia didynama, Lindau in Engl. Jahrb. xxiv. 313, may be this 
species. [t was collected at Lufiro in Nyasaland by Captain Descamps. 
