248 105- LEGUMINOSAE 



Species 3. Tropics ; one species naturalized. They yield timber, 

 gum, tanning and dyeing materials, edible fruits, and medicaments. 



Pithecolobium Mart 

 Fruit straight or nearly so 27 



27. Fruit dehiscing elastically. Petals united to the middle. Shrubs. — 



Species 5. Tropics. They yield timber, gum, and medicaments, and 



are used also as ornamental plants Calliandra Benfh. 



Fruit dehiscing in two straight and thin, not elastic valves, or indehiscent. 

 Petals united to the middle or beyond. — Species 45. Tropical and 

 South-east Africa ; several species also cultivated in Egypt. Some 

 species (especially A. Lebbek Benth.) yield timber, tanners' bark, giun, 

 condiments, and medicaments, or ser^'e as ornamental plants. (In- 

 cluding Zygia Benth.) Albizzia Durazz. 



28. (i.) Petals 1—6, the posterior one (the one next the placenta) inside of all 



in the bud, not forming a papilionaceous corolla, or wanting altogether. 

 Embryo usually with a straight radicle. [Subfamily CAESALPINIOI- 



DEAE.] 29 



Petals 5, the posterior outside in bud, usually constituting a papilionaceous 

 corolla. Sepals united below. Stamens to, more rarely 5 — 9. Embryo 

 usually with an inflexed radicle. Leaves simple, unifoliolate, digitate, 

 or once pinnate. [Subfamily PAPILIONATAE.] 104 



29. Calyx undivided or shortly lobed in the bud, usually more deeply divided 



at the time of flowering 30 



Calyx, already in the bud, divided down to the receptacle or nearly so . 39 



30. Stamens i — 10. Corolla of 5 petals, nearly regular. Trees or shrubs. 31 

 Stamens 16 or more. Corolla of 6 petals, or of a single petal, or wanting. 



Calyx undivided in bud. Leaves imparipinnate or unifoliolate. Trees. 

 [Tribe SWARTZIEAE.] 37 



31. Leaves undivided, 2-lobed, 2-parted, or of 2 leaflets. [Tribe BAUHI- 



NIEAE.] ■ .... 32 



Leaves pinnate, with many leaflets. Stamens 10 34 



32. Ovary and fruit with a very long stalk, the fruit turgid. Ovules few. 



Style short. Stamens 10. Petals red. Calyx 5-lobed, imbricate 

 in bud. Climbing shrubs. Leaves undivided, penninerved or faintly 

 trinerved. — Species 3. West Africa. {Bandeiraea Welw.) 



Griffonia Baill. 

 Ovary and fruit with a short or rather short stalk, the fruit not turgid . 33 



33. Receptacle (calyx-tube) very long. Petals yellowish. Stamens 10, partly 



sterile. Leaves undivided, ovate or elliptical. Racemes many-flowered. 

 — Species i. Madagascar. (Under Bauhinia L.). . Gigasiphon Drake 

 Receptacle (calyx-tube) not ver}^ long. — Species 40. Tropical and 

 South Africa, and Egypt. Some species yield timber, fibre, tanning 

 and dyeing materials, edible roots, oily seeds, and medicaments, or 

 serve as ornamental plants. (Plate 67.) . . . . Bauhinia L. 



