442 LXix. RUBiACE^. [Oldenlandiu 



4-partite, g in. long ; segments linear, acute ; coi'olla salver-shaped ; 

 tiibe 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; ovvdes numerous. 

 HuiLLA.— Lopollo ; fl. Dec. 1859. No. 5313- 



5. 0. decumbens Hiern, I.e., p. 54. 



PuNOO 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 Hiem, I.e., 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 Eupliorhla, 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. An annual 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, g to | in. long ; stipules shortly sheathing ; stems 

 nearly reduced to flowei-ing 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 f in. long, but mostly very short ; 

 flowers nearly \ 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 ovaiy ; 

 corolla-tube long, slender, many times exceeding the calyx, 



