442 LXIX. RUBIACER. [Oldenlandia 
4-partite, } in. long ; segments linear, acute ; corolla salver-shaped ; 
tube more than twice the length of the calyx-limb ; corolla-limb 
quadrifid ; lobes ovate, obtuse, apiculate ; anthers at throat of the 
corolla ; style slender, exserted, bifid ; ovary campanulate, shorter 
than the calyx-limb, 2-celled; ovules numerous. 
Hu1iis.—Lopollo ; fl. Dec. 1859. No. 5313. 
5. 0. decumbens Hiern, J.c., p. 54. 
Punco ANDONGO.—A perennial herb ; rootstock thick ; stems several, 
elongated, rooting-decumbent ; flowers whitish-purplish. At the damp 
borders of forests near Muta Lucala by the river Cuanza ; fl. and fr. 
March 1857. No. 3073. 
6. 0. rigida Hiern, J.c., p. 55. 
MossaMEDES.— A perennial herb; rootstock thick; stems 
numerous, twisted, branched from the base, more or less prostrate ; 
leaves almost always lurid- or sordid-purplish ; flowers lurid-purple. 
In rocky sandy places at the base of the mountains of Serra de 
Montes Negros ; fl. and fr. 10 August 1859. No. 5322. In sandy- 
muddy maritime stations of Sacco de Giraul; late fr. July 1859. 
No. 5323. A small erect annual herb, branched from the base ; 
branches slender ; flowers white. In hilly gravelly maritime places 
amidst a decumbent HMuphorbia, to the south of the town, abundant ; 
fl. and fr. end of June 1859. An annual form. No. 5324. An 
annual herb, much branched by degrees from the base; leaves 
narrowly linear; flowers white. In damp sandy situations by the 
river Bero, very abundant and almost forming clumps; ‘fl. and fr. 
middle of July 1859. Anannual form. No. 5325. A slender erect 
annual herb, 4 to 12 in. high, sometimes sparingly branched, in other 
cases very much branched ; corolla-tube long, yellowish ; corolla-limb 
quadrifid, milk-white, soon turning violet-blue. In sandy places by 
the river Bero, near Cavalheiros, very abundant; fl. and fr. end of 
June 1859. An annual form. No. 5326. Flowers blue. In sandy 
thickets near the river Maiombo, Quitibe de Cima; fl. and fr. June 
1860. Perhaps a slender annual form of this species. No. 3074. 
_BENGUELLA.—An erect, much branched, apparently annual herb, 
somewhat glaucescent-green ; flowers white. In sandy, bushy places 
about the city; fl. and fr. June 1859. Probably a form of this 
species. No. 3039. 
7. 0. Welwitschii Hiern, sp. n. 
A puberulous-scabrid annual herb, 3 to 6 in. long; root 
descending vertically in the form of a narrow screw, about 3 in. 
deep ; leaves all radical, or nearly so, crowded, opposite, forming 
a rosette, numerous, lanceolate or narrowly elliptical, apiculate, 
gradually narrowed to the sessile or subsessile base, with revolute 
margins, 3 to # in. long; stipules shortly sheathing; stems 
nearly reduced to flowering scapes, several, ascending from near 
the crown of the root, 3 to 7 in. long (including the dichotomous 
or trichotomous inflorescence), subterete, undivided in the lower 
half; pedicels ranging up to 3 in. long, but mostly very short; 
flowers nearly 3 in. long, usually milk-white, but at length some 
bluish ; calyx-limb deeply 4-lobed, with lanceolate persistent not 
accrescent segments about as long as the campanulate ovary; 
corolla-tube long, slender, many times exceeding the calyx, 
