278 XCI. GESNEKIACE^. 



3. UNCARIA, Burchell. 



Calyx 5-parted, persistent ; lobes linear, 1 shorter. Corolla 

 tubulose- funnel shaped, equal at base, with a subequal, 5-lobed 

 limb, the lobes obtuse. Stamens 4, included, didynamous, in 

 the base of corolla-tube, with a rudiment of a fifth ; anthers 

 ovoid. Ovary 2-celled ; ovules several in each cell, crowded, 

 2-seriate ; stigma 2-lamellate. Fruit ligneous, at length im- 

 perfectly opening, 2 -celled, angularly lobed, the lobes simple, 

 branched, or sometimes ending in a hooked, very rigid spine. 

 Seeds numerous, oblong, angular, rough. — Ilarpagophytum, 

 BC. Frod. ix.p. 257. 



Prostrate, branching herbs, covered with minute white dots. Leaves 

 opposite, petioled, 5 -nerved, palmatifid, the lobes sinuate-cut. Pedicels 

 axillary, 1-flowered, short. Corolla purple, with a pale tube. The famous 

 " Grapple-plaut " of Burchell, found in and beyond the Northern frontier, 

 is U. procumhens. — 3 species, all Northern . 



4. PTERODISCUS, Hook. 



Calyx small, 5-parted. Corolla funnel-shaped, with a 

 spreading, 5-lobed, subequal limb. Stamens 4, didynamous, 

 included, with a rudimentary fifth ; filaments with thickened, 

 w^oolly bases ; anthers 2-celled, cells triangular, opening by 

 oblong pores. Ovary ovate, oblique, with a dorsal gland at 

 base ; style included ; stigma 2-labiate, the lobes subulate. 

 Fruit leathery, indehiseent, roundish-compressed, broadly 

 2-winged round the margin, the disk subtuberculate, 2-celled 

 (or spuriously 6-celled, 2 cells fertile). Seed solitary, pendu- 

 lous, oblong, terete-compressed, produced at the apex into a 

 subulate point, with a pit-like depression. — Hook. Bot. Mag. 

 t. 4117. 



A tuberous-rooted herb, with opposite, oblong, sinuate-toothed leaves, 

 on short petioles 2-glandular at base, and axillary, solitary, very showy 

 piu'ple flowers. — Found by Burke and Zeyher at Macalisberg. 



Teibe 2. Sesame^e. (G-en. 5-6.) 



5. SESAMOPTERIS, DC. 



Calyx 5-parted, at length deciduous. Corolla-tube widening 

 upwards ; limb plaited, sub-2-labiate, upper lip emarginate, 

 lower semi-3-fid, the medial lobe long. Stamens 4, didyna- 

 mous, w4th a fifth rudiment ; anthers oval-oblong. Stigma 2- 

 lamelled. Capsules oblong, bluntly 4-angled or 2-lobed, 

 furrowed, acuminate with the base of style, 2-valved, 2-celled 

 (the valves incurved, as if 4-celled). Seeds compressed, with 

 a membranous wing and flat cotyledons. — DC. Prod. ix. p. 

 251. 



S. pentaphtjUa, DC, is an erect annual, with long petioled, 5-foliolate 



