510 2l6. ACANTHACEAE 



60. Calyx 5-lobed, with broad segments. Sterile stamen present. Stigma- 



lobes unequal. Shrubs. Flowers in racemes. Bracteoles none. — 

 Species 4. West Africa. {Scytanthus T. Anders.) Thomandersia Baill. 

 Calyx 5-parted, with narrow segments. Sterile stamen absent. Stigma- 

 lobes subequal. Seeds 4. Bracteoles present 61 



61. Anther-halves of the longer stamens elliptical, one inserted much lower 



than the other ; those of the shorter stamens suborbicular and divergent. 

 Flowers in panicles. — Species i. Equatorial West Africa. 



Filetia Miq. 



Anther-halves oblong, nearly parallel and inserted at about the same 



level 62 



62. Disc laterally 2-lobed. Bracts long. Flowers in spikes. — Species 2. 



East Africa. (Under Asy stasia Blume). . . . Parasystasia Baill. 

 Disc not 2-lobed. Bracts short 63 



63. Pollen-grains prickly, not striped. Anther-halves shortly spurred at the 



base. Flowers in panicles. — Species i. East Africa. 



Asystasiella Lindau 



Pollen-grain striped, not prickly. — Species 20. Tropical and South 

 Africa. Some of them are used as vegetables or as ornamental or 



medicinal plants Asystasia Blume 



64- (55) Ovules 3 — 6 in each ovary-cell. Fertile stamens 2, staminodes none. 

 Anthers 2-celled. Herbs. Flowers in panicles. — Species i. Natural- 

 ized in the Mascarene Islands. Used medicinally. [Tribe AND- 

 ROGRAPHIDEAE.] AndrograpMs Nees 



Ovules 1-2 in each ovary-cell. [Tribes GRAPTOPHYLLEAE, ODON- 

 TONEMEAE, ISOGLOSSEAE, and JUSTICIEAE.] 65 



65. Fertile stamens 4. Anthers 2-celled 66 



Fertile stamens 2 70 



66. Corolla-tube long, cylindrical. Anther-halves pointed at the base. Leaves 



ovate or elliptical. Flowers in terminal cymes or panicles. ... 67 

 Corolla-tube rather short and wide. Leaves oblong or lanceolate. . . 68 



67. Stigma entire. Stamens inserted a little below the throat of the corolla. 



Bracteoles small. — Species i. Central Africa. [Styasasia S. Moore, 



under Asystasia Blume) Isochoriste Miq. 



Stigma 2-lobed. Stamens inserted in the middle of the corolla-tube. 

 Bracteoles large. — Species 2. Madagascar. . . Forcipella Baill. 



68. Anther-halves blunt at the base. Stamens inserted at the throat of the 



corolla. Posterior stigma-lobe tubercle-shaped. Calyx-segments un- 

 equal. Seeds oblong. Flowers crowded in the axils of the leaves. 

 Bracts and bracteoles narrow, clothed with red hairs. — Species i. 



Madagascar Synchoriste Baill. 



Anther-halves pointed at the base. Bracts and bracteoles broad. . 69 



69. Inflorescences axillary, cymose, borne on a long stalk. Bracts incised. — 



Species i. Madagascar Podorungia Baill. 



