448 LXIX, RUBIACER. [Oldenlandia 
fr. beginning of April 1860; also in elevated mossy pastures near 
Humpata, in company with species of Xyris and Isoétes; fi. and fr. 
April1860. No. 3054. 
23, 0. pellucida Hiern, sp. n. 
A tender erect annual herb, herbaceous-green, glaucescent, 
growing in dense masses; stem simple, 2 to 3 in. high, slender, 
somewhat compressed, quadrangular, hispidulous on the angles ; 
leaves elliptical or somewhat ovate, apiculate not acuminate at 
the apex, more or less abruptly wedge-shaped at the base, thinly 
membranous, glabrous or nearly so except the thinly ciliate 
margin, pellucid-punctate, } to 1 in. long by } to 2 in. broad; 
petiole ;3, to 2 in. long ; stipules multifid, with sub-hyaline fringe- 
like segments ; flowers milk-whitish, about 3 in. long, on very 
short pedicels 3 to 6 together at the apex of the stem or solitary in 
the upper axils; calyx-teeth 4, very loosely surrounding at the 
base the slender corolla-tube and about half its length, persistent, 
not accrescent; corolla-limb quadrifid, its lobes milk-white, 
obovate, rather obtuse, abruptly acuminate ; anthers sub-exserted ; 
capsule 2-celled, puberulous. 
HviLia.—On the moist sides of streams‘on the plateau of Humpata 
near Empalanca ; fl. and fr. middle of April 1860. No. 5344. 
24, 0. benguellensis Hiern, sp. n. 
An erect glabrate shrub, 2 to 4 ft. high, with an Umbelliferous 
habit; branches mostly opposite, spreading, terete, shining ; 
branchlets leafy ; leaves sub-linear, somewhat scabrid above, 
sessile, 3 to 2 in. long, margins revolute along the midrib; 
stipules sheathing, truncate; inflorescence terminal, repeatedly 
branched, corymbose, bracteate, in fruit ranging from 1 to 3 in. in 
diameter ; ultimate pedicels shorter than or rather exceeding the 
fruit ; calyx-limb 4-partite, with ovate not accrescent segments ; 
‘corolla somewhat exceeding the calyx, quadrifid, with valvate 
lobes ; style bifid; fruit campanulate, slightly compressed, about 
2 in. long, glabrous, 2-celled, loculicidal ; seeds numerous, some- 
what angular. 
MossaMEDES.—In mountainous rocky places at the banks of the 
river Maiombo; in old fr. Oct. 1859. No. 5353. In hilly, bushy, 
stony places, by the river Maiombo, abundant ; fl.-bud and fr. Oct. 
1859. No. 5354. 
Huiixia.—In rather dry thickets between Mumpulla and Nene ; fr. 
‘Oct. 1859. No. 5355. 
25. 0. neseoides Hiern, sp. n. 
An erect annual herb, 4 to 12 in. high, nearly simple or with 
suberect or ascending branches from the base upwards, rather 
slender; stem and branches quadrangular, hispidulous; leaves 
opposite, elliptical or somewhat lanceolate, mostly narrowed 
towards both ends, pointed or apiculate at the apex, more or less 
wedge-shaped at the base, membranous, flat except the narrowly 
revolute margin, slightly hispidulous especially along the nerves 
beneath, becoming very pale and glaucescent beneath, 3 to 12 in. 
long by } to 3 in. broad; lateral veins about 4 on each side of the 
