Stellularia] lxxxix. scRorriuLARiACEvE. 775 



HuiLLA. — An erect annual branched herb, with the habit of Nemia 

 or even more like Striga ; stem pentagonal ; leaves opposite, linear- 

 lanceolate, blackish green-purple above, herbaceous-green beneath ; 

 flowers spicate ; calyx bibracteolate at the base, 4 dentate, the teeth 

 long, acuminate, persistent ; corolla glossy yellow in prime flower, soon 

 turning green, at length in drying black ; the tube rather long, curved 

 from the middle up to the 5-cleft limb ; the lobes linear, somewhat 

 fleshy, rather thick, spreading, four of them more or less approximated ; 

 the floral bract embracing the flower at the base, broadly ovate, 

 keeled ; the bracteoles linear ; capsule 2-valved, cylindrical-oblong ; 

 the valves in the apparently immature capsules bifid at the apex ; 

 seeds numerous. In a bushy moist pasture near Oatumba, plentiful 

 but seen only in one locality ; fl. and fr. April 1860. No 5838. ^n 

 annual erect herb, green in the living state, at length turning black ; 

 flowers at first purple, at length greenish, black when dry. In 

 herbaceous thickets at the Monino ; fl. beginning of April 1860. No. 5837. 



22. BUCHNEEA L. ; Benth. k Hook. f. Gen. PI. ii. p. 968. 



1. B. Henriquesii Engl. Bot. Jabrb. xviii. p. 69 (1893). 

 HuiLLA. — A perennial herb ; root woody ; stems numerous ; leaves 



bright herbaceous-green ; flowers of a very beautiful and very bright 

 violet colour, bearing a resemblance to some verbenas. In hilly sunny 

 places on a sandy clay soil, near LopoUo, rather rare ; fl. Nov. 1859. 

 No. 5833. 



2. B. pallescens Engl., I.e., sxiii. p. 512 (1897). 

 MosSAMEDES. — An annual, slender, erect herb, herbaceous-green, 



with deep blue flowers. In sandy thickets about the river Bero, very 

 rare ; fl. beginning of July 1859. No. 5825. Flowers blue. In sandy 

 places among low bushes at the banks of the river Maiombo ; fl. and 

 fr. Oct. 1869. No. 5826. 



This species bears some resemblance to B. Henriquesii, and should 

 be compared with it ; the inflorescence, however, is more elongated 

 and laxer. 



3. B. eiliolata Engl., I.e., xviii. p. 69 (1893). 



HuiLLA. — A very elegant, annual herblet, scarcely a span high ; 

 stem slender, branched from the base or nearly simple ; branches 

 spreading-ascending, flliform ; leaves opposite, linear ; flowers deep 

 violet purple, tolerably large for the habit of the plant ; corolla 

 remarkable for the long broadly linear quite flat lobes of the sub- 

 bilabiate deeply 5-cleft limb, the lobes deeply emarginate at the apex, 

 the 2 upper ones a little shorter than the rest ; stamens 4, didynamous, 

 with reflected anthers. In somewhat spongy pastures flooded by the 

 summer rains and then in company with Utricularitx., on the Humpata 

 plateau ; fl. beginning of April 1860. No. 5828. 



4. B. andongensis Hiern, sp. n. 



An erect annual herb, branched from the base, more than 8 in. 

 high, dusky in the dry state; branches obtusely tetragonal, 

 hispidulous-scabrid ; some of the upper internodes exceeding the 

 leaves; leaves mostly opposite, obovate-oblong, obtuse or sub- 

 iipiculate at the apex, wedgeshaped at the sessile or subsessile 

 base, trinerved, entire or obsoletely denticulate, herbaceous-green, 

 membranous, scabrid, | to 3 in. long by | to 1 in. broad ; flowers 

 whitish, ^ to ^ in. long, sessile or subsessile, many together. 



