l8l .MELASTO.MATACEAF 395 



Anthers with a wavy surface, hnear, rarely l)roader, but then connective 

 not distinctly lengthened at tlie base. — Species 20. Tropical and South- 

 east Africa. Some species are used as ornamental or medicinal plants. 



Osbeckia L. 



1 5. Anthers hnear. Connective not or scarcely lengthened at the base, provided 



with two bosses in front. Stamens usually unequal in length. Calyx- 

 tube bristly. Shrubs. — Species 15. Tropics. Some species yield 



edible fruits and medicaments. Tristemma Juss. 



Anthers ovoid. Connective lengthened at the base, unappendaged. Sta- 

 mens equal in length. Ovary glabrous at the top. Herbs. Flowers 

 solitary 16 



16. Flowers 4-merous. Calyx-tube hairy. Ovary inferior. Flowers terminal. 



— Species i. West Africa. (Under Guyonia Naud.) Afzeliella Gilg 

 Flowers 5-merous. Calyx-tube glabrous. Ovary half-inferior. — Species 



2. West Africa Guyonia Naud. 



17. (3.) Fruit bursting irregularly or remaining closed ; skin fleshy or leathery, 



rarely membranous. Connective furnished with appendages in front 

 and behind, rarely only in front. [Tribe DISSOCHAETEAE.] . 18 

 Fruit opening by 3 — 6 valves ; skin membranous, rarely leathery. Con- 

 nective usually furnished with appendages only behind 25 



18. Connective with two spurs in front, unappendaged behind. Stamens equal 



or nearly so 19 



Connective with two spurs or bosses in front and i — 2 behind. Calyx- 

 lobes tooth-shaped, bristle-shaped, or wanting. Flowers in Cannes, 

 umbels, or panicles 20 



19. Calyx distinctly 5-lobed. Connective very shortly prolonged at the base. 



Fruit a berry. Herbs. Flowers solitary. — Species i. West Africa 



(Cameroons) Tetraphyllaster Gilg 



Calyx obscurely lobed. Connective much prolonged at the base. Fruit a 

 capsule with a membranous skin. Shrubs or trees. Flowers in panicles. 



— Species 5. West Africa Sakersia Hook. fil. 



20. Stamens distinctly unequal, the connective of the longer ones lengthened 



at the base and furnished with i spur behind and 2 in front, that of the 

 shorter ones also with one spur behind but none in front. Flowers 5-merous. 

 Calyx-tube top- or urn-shaped ; lobes short, alternating with accessory 

 teeth. Petals red. Ovary adnate up to the middle. Shrubs. Flowers 

 in terminal, few-flowered cym.es. — Species 3. West Africa. 



Dicellandra Hook. fil. 



Stamens equal or nearly so, rarely very unequal, but tlien the connective 



of all with 2 appendages in front and usuall\- not lengthened at the 



base 21 



21. Stamens distinctly unequal. Flowers 4-merous. Cal\x-tube constricted 



above the ovary, saucer-shaped at the top, entire or nearly so. Climbing 

 shrubs. Lower leaves alternate, upper whorled. Flowers at the base- 



