286 XCri. ACANTHACKiE. 



separating; from the back and walls of the valves, curving up- 

 wards with the seeds and seed-hooks. — DC. Frod. xi. p. 4:7^. 



Herbs or shrubby plants, mostly tropical. — 3 South African species, 

 Eastern and from Natal. 



17. PERISTROPHE, Nees. 



Calyx 5-cleft or parted, equal, sessile in bracteated capitula. 

 Corolla resupinate, 2-labiate, the lips flat, the upper 3-toothed, 

 lower entire or 2-toothed. Stamens 2 ; anthers narrow, 2- 

 celled, the cells placed obliquely one over the other, pointless. 

 Capsules 2-valved, 2-celled, Avith a long sterile base, cells 2- 

 seeded at the apex ; the septum adnate, persistent. — DC. Frod. 

 xi. p. 492. 



Herbs, -with purple, long-tubed flowers, in axillary or terminal umbellate 

 and 2-bracteate heads. — 2 species, in the Eastern districts and Katal. 



18. HYPOESTES, E. Br. 



Calyx 5-cleft or parted, equal, included in a 4-leaved invo- 

 lucre. Corolla 2-lipped, the lower lip deeply 3-fid. Stamens 

 2 ; anthers 1-celled, cohering in the bud ; cell lateral on a 

 narrow^ connective. Stigma 2-fid. Caj)sule compressed and 

 seedless at base, 2-celled and 4-seeded above ; septum adnate, 

 complete. Seeds tubercled. — DC. Frod. xi. p. 501. 



Herbs or shrubs, Asiatic, Australian, and African, very abundant in 

 Madagascar. —2 species, in the Eastern districts and Natal. 



19. RAMUSIA, Nees, not E. Mey. 



Calyx 5-parted, equal. Corolla 2-labiate, the tube long, the 

 lips about equal, the upper entire, lower 3-fid, Stamens 2, in 

 the throat, exserted ; anthers 1-celled, glabrous, pointless, 

 keeled at back, fixed above the base. Stigma entire. Capsule 

 unknown. — DC. Frod. xi. p. 309. 



An undershrub, with angularly bent, slender branches, oval, bluntly 

 acuminate leaves, and terminal or axillary, sj)iked flowers. Bracts small. 



20. RHINACANTHUS, Nees. 



Calyx 5-parted, equal, subtended by small, subulate bracts 

 and bracteoles. Corolla salver-shaped, 2-lipped, with a long, 

 slender tube, the upper lip narrow, lower equally 3-fid. Sta- 

 mens 2, exserted ; anthers 2-celled, pointless, placed one above 

 the other on the connective. Capsule clavate, with a long, 

 compressed, barren base, 4-2-seeded above; septum adnate, 

 complete. — DC. Prod. xi. p. 442. 



R. ohiongns, Nees, our only species, is an undershrub, found on the Chumi 

 mountain by Eckler and Zeylier. Leaves lanceolate-oblong ; panicles 

 axillary and terminal, 2-3-chotomous ; flowers tufted. 



