2l6. ACANTHACEAE 513 



Stem herbaceous. Inflorescences abundantly branched. Bracts broad. 

 Lower anther-half spurred, the upper not. Fruit contracted into a long 

 stalk. — Species 6. Tropical and South Africa. {Under J usticia L.) 



Rhaphidospora Nees 



90. Stem woody, shrubby. Calyx 5-cleft, scarious. Corolla large, red. — 



Species 4. East Africa and Madagascar. (Under M acrorungia C. B. 



Clarke) Symplectochilus Lindau 



Stem herbaceous 91 



91. Stamens inserted at the throat of the corolla. Calyx membranous. Parti- 



tion of the fruit separating from the valves at maturity. Flowers small. 

 Bracts broad, in 4 ranks, whereof two enclose no flowers. Bracteoles 



large. — Species 9. Tropics Rungia Nees 



Stamens inserted in the lower part of the corolla-tube. Partition of the 

 fruit not separating from the valves. — Species 10. Central Africa. 

 Some are used as ornamental plants. (Under Justicia L.) 



Nicoteba Lindau 



92. (81.) Corolla-tube bell- or funnel-shaped, wide throughout or much widened 



above 93 



Corolla-tube cyhndrical, narrow and not or slightly widened above. . 95 



93. Anther-halves inserted at slightly unequal heights. Corolla-tube some- 



what shorter than the limb. Pollen-grains ovoid, with several rows 

 of patches. Disc lobed. Fruit oblong or club-shaped. Flowers in 

 spikes or panicles. — Species 18. Tropical and South Africa. (Under 



Adhatoda Nees or Justicia L.) Duvernoya E. Mey. 



Anther-halves inserted at very unequal heights, more rarely at slightly 

 unequal ones, but then corolla-tube as long as or longer than the limb. 

 Pollen-grains more or less globose, nearly smooth. Herbs or under- 

 shrubs . 94 



94. Flowers in cymes. Corolla-tube long. Stamens inserted at its middle. 



Anther-halves inserted at sHghtly unequal heights. Stigma 2-lobed. 

 Fruit oblong, without a distinct stalk. Seeds 2 fertile and 2 sterile. 

 Leaves sessile, lanceolate. — Species i. Madagascar. 



Melittacanthus S. Moore 



Flowers in racemes or panicles. Fruit contracted into a stalk. — ■ Species 



40. Tropical and South Africa Isoglossa Oerst. 



95. Corolla-tube short, much shorter than the hps. Anther-halves inserted at 



slightly unequal heights. Shrubs 9^ 



Corolla-tube long or rather long ; upper lip entire or shortly toothed. 

 Disc cup-shaped 9^ 



96. Upper lip of the corolla deeply cleft. Anther-halves pointed. Disc cup- 



shaped. Leaves broad, unequal-sided. Flowers in panicles. — Species i. 



Madagascar PopuUna Baill. 



Upper hp of the corolla entire or shortly toothed. Disc ring-shaped. 

 Flowers in spikes or fascicles 97 



2K 



