506 216. ACANTHACEAE 



27. Staminal ridges confluent, hence all stamens inserted upon a common 



fold. Anther-halves blunt. Fruit oblong ovoid or globose, 3 — 4- 

 seeded. Flowers solitary or in spikes. — Species 4. Madagascar. 



Strobilanthes Blume 

 Staminal ridges separate. Flowers solitary or in cymes 28 



28. Calyx 5-cleft. Anther-halves usually tailed. Fruit Unear, 4-seeded. — 



Species 30. Tropical and South Africa. (Calophanes Don, including 



Phillipsia Rolfe) Dyschoriste Nees 



Calyx 5-parted. Anthers blunt. Fruit oblong or elliptical .... 29 



29. Fruit 2-seeded. Pollen-grains ovoid, with longitudinal ribs. Under- 



shrubs. — Species i. Southern East Africa. Strobilanthopsis S. Moore 



Fruit 4-seeded. Pollen-grains globular, prickly. — Species 8. Tropics. 



(Under Dischistocalyx T. Anders.) . . . Acanthopale C. B. Clarke 



30. (22.) Fertile stamens 2 3^ 



Fertile stamens 4 32 



31. Ovules 3 — 6 in each ovary-cell. Staminodes present. Corolla nearly 



2-lipped ; tube short, wide, funnel-shaped. Flowers several together 

 in the leaf-axils. Shrubs. — Species 2. Madagascar. (Under Rutty a 



Harv.) Forsythiopsis Bak. 



Ovules 10 in each ovary-cell. Flowers solitary. Herbs. — Species i. 

 Madagascar Ruelliola Baill. 



32. Filaments free from the base. Anthers with a fertile and a rudimentary 



half. Calyx 5-lobed. Corolla white. Ovules 3 — 4 in each ovary-cell. 

 Flowers in spikes or heads. — Species 3. West Africa. {Physacanthus 



Benth.) Haselhoftia Lindau 



Filaments united in pairs at the base, decurrent in the form of two ridges. 

 Anthers with both halves fertile; Calyx 5-cleft or 5-parted. ... 33 



33. Staminal ridges confluent. Anthers not tailed 34 



Staminal ridges separate 35 



34. Corolla long funnel-shaped. Flowers in loose panicles. — Species i. 



Island of St. Thomas. (Under Paulowilhelmia Höchst.) 



Heteradelphia Lindau 



Corolla tubular. Flowers in spike- or head-like inflorescences. — Species 



5. Central Africa Hemigraphis Nees 



35. Anther-halves of the anterior stamens, at least one of them, tailed at the 



base. Calyx-segments subequal. Corolla funnel-shaped, with a short 

 and wide tube. Flowers in panicles. — Species 15. Tropics. (Includ- 

 ing Epiclastopelma Lindau) Mimulopsis Schweinf. 



Anther-halves without an appendage at the base, rarely {RuelUopsis) 

 all tailed, and then calyx-segments unequal and flowers solitary. . 36 



36. Stigma 2-lobed. Ovules 3 — 4 in each ovary-cell. Disc cup-shaped, 



toothed. Anthers exserted. Corolla red. Flowers solitary. Leaves 

 crowded at the end of the branches. Glabrous shrubs. — Species i. 



Madagascar Camarotea Elliot 



Stigma entire or provided with a small tooth 37 



