2l6. ACANTHACEAE 51I 



Inflorescences terminal, racemose, the lower flowers solitary in the leaf-axils. 

 Pedicels 4-winged. Seeds 2, roundish. — Species i. Madagascar. 



Chlamydacanthus Lindau 



70. (65.)Staminodes 2. Fruit contracted into a long stalk. Bracts and 



bracteoles small 71 



Staminodes none, rarely (Dwueywoy«) solitary 73 



71. Anthers projecting far beyond the corolla-tube ; halves at equal heights, 



pointed at the base. Calyx short. Corolla red ; tube long, funnel- 

 shaped. Shrubs. Flowers panicled. — Species i. Naturalized in 

 West Africa. An ornamental and medicinal plant. Graptophyllum Nees 

 Anthers slightly projecting, with one half only developed ... 72 



72. Anthers pointed. Corolla red ; tube short and wide. Flowers in cymes 



or panicles. — Species 5. East and South Africa and Madagascar. 



Ruttya Harv. 

 Anthers blunt. Corolla yellow ; tube long, ventricose. Flowers solitary 

 or in cymes. Shrubs. — Species 4. Island of Socotra. 



BaUochla Balf. fil. 



73. Anthers i-celled, blunt 74 



Anthers 2-celled 80 



74. St'gma entire 75 



Stigma 2-lobed 76 



75. Flowers in cymes surrounded by united bracts and collected in heads or 



fascicles. Bracteoles exceeding the calyx. Calyx scarious. Woolly 



shrubs. — Species 2. Madagascar Lasiocladus Boj. 



Flowers in spikes or panicles, with free bracts. Corolla-tube very long and 

 narrow. — Species 9. Tropics. . . . . . Brachystephanus Nees 



76. Corolla-tube very short, bell-shaped. Stamens inserted in the lower part 



of it. Fruit contracted into a long stalk. Flowers in panicles. — 



Species i. Equatorial West Africa (Cameroons). Oreacanthus Benth. 



Corolla-tube not very short, cylindrical or funnel-shaped. Stamens 



inserted in its upper part or at the throat 77 



77. Flowers in spikes. Bracteoles equalling the calyx. Corolla funnel-shaped. 



Fruit contracted into a long stalk. — Species 2. Central Africa. 



Monothecium Höchst. 



Flowers in C3'mes, heads, or panicles. Bracts usually united. Bracteoles 



exceeding the calyx. Calyx scarious. Fruit contracted into a short 



stalk or not contracted 78 



78. Calyx deeply two-lipped, shortly 5-toothed. Corolla funnel-shaped. 



Fruit without a stalk. Flowers panicled. — Species i. Madagascar. 



Amphiestes S. Moore 

 Calyx regular or nearly so, 4 — 5-lobed or -parted 79 



79. Calyx 4-parted. Flowers in umbellately arranged cymes. — Species 2. 



Madagascar and Comoro Islands Periestes Baill. 



Calyx 5-lobed to 5-parted. — Species 70. Tropical and South Africa. 

 Some are used in medicine. Hypoestes R. Br. 



