500 211. MARTYNIACEAE — 212. OROBANCHACEAE — 213. GESNERACEAE 



FAMILY 211. MARTYNIACEAE 



Erect, hairy herbs. Leaves broad, undivided. Flowers in racemes, with 

 large bracteoles, irregular, hermaphrodite. Calyx unequally 5-lobed, slit in 

 front. Corolla obliquely campanulate, two-lipped, 5-lobed, red. Fertile 

 stamens 2, inserted on the lower part of the corolla-tube, included ; staminodes 

 3. Disc regular. Ovary superior, i-celled, with 2 two-cleft parietal placentas. 

 Ovules 4 — 16, descending, inverted. Style i, long, with 2 stigmas or stigma- 

 lobes. Fruit ending in two horns, 8-ribbed, 4-chambered and 4-seeded, opening 

 loculicidally at the apex ; exocarp leathery, endocarp hard. Seeds with a 

 straight embryo and thin albumen. (Under PEDALINEAE.) 



Genus i, species i. Naturalized in Madagascar and Mauritius. An 

 ornamental and medicinal plant Martynia L. 



FAMILY 212. OROBANCHACEAE 



Parasitic herbs destitute of green colour. Leaves reduced to scales. Flowers 



in terminal spikes or racemes, irregular, hermaphrodite. Calyx 2 — 5-toothed or 



consisting of two entire or 2-toothed segments or sepals. Corolla 4 — 5- 



lobed, imbricate in bud. Stamens inserted on the tube of the corolla, 4, in two 



pairs of unequal length. Anthers opening lengthwise Ovary superior, i- 



celled, with 4 parietal placentas. Ovules numerous, inverted. Style simple. 



Fruit a locuhcidal capsule. Seeds with a pitted testa, a copious albumen, and 



an undivided embryo. — Genera 2, species 30. North and Central Africa. 



(Plate 139.) 



Calyx 5-lobed, with blunt or rounded, nearly equal lobes. Corolla almost 



equally 5-lobed. Bracteoles adnate to the calyx. — Species 6. North 



and Central Africa. (Under Pkelipaea E. Mey.) (Plate 139.) 



Cistanche Hoffm. & Link 

 Calyx 2 — 5-toothed with pointed teeth, or consisting of two entire or 2- 

 toothed segments or sepals. — Species 25. North and East Africa ; 

 two species also naturalized in South Africa. Some are used as veget- 

 ables or as medicinal or ornamental plants, others are noxious weeds. 

 " Broomrape." (Including Pkelipaea E. Mey.) 



Orobanche (Tournef.) G. Beck 



FAMILY 213. GESNERACEAE 



Herbs or undershrubs. Leaves undivided, without stipules. Flowers 

 irregular, hermaphrodite. Sepals united below. Petals united below, im- 

 bricate in bud. Fertile stamens 2. Disc present. Ovary superior, i-celled, 

 with parietal placentas, sometimes incompletely 2 — 4-celled. Ovules numerous, 

 inverted. Style simple. F"ruit a capsule. Seeds exalbuminous ; embryo 

 straight. — Genera 6, species 65. Tropical and South Africa. {CRYTAND- 

 REAE.) (Plate 140.) 



