44. Petal 1, greenish-yellow. Calyx valvate in bud. Ovules very numerous. Styles long. Trees.--Species 1. Madagascar. =Aprevalia= Baill. Petals 5. 45 45. Sepals united high up, excepting one, valvate in bud. Petals unequal, red. Ovules numerous. Fruit straight, turgid, dehiscing by two valves. Seeds transverse. Trees. Bracts coloured.--Species 1. Madagascar. Used as an ornamental plant. =Colvillea= Boj. Sepals free above the receptacle. 46 46. Sepals valvate in bud. Petals yellow or red. Ovules numerous. Style thread-shaped. Fruit dehiscing by two valves. Seeds transverse, oblong, albuminous. Trees. Stipules indistinct. Flowers large.--Species 3. Tropics; also cultivated in various regions. Ornamental plants. “Flame-tree.” =Poinciana= L. Sepals imbricate in bud. Seeds exalbuminous. 47 47. Ovule 1, very rarely ovules 2. Seed 1, placed lengthwise. Fruit winged at the top, indehiscent. Petals subequal, white or yellow. Spinous climbing shrubs. Flowers small.--Species 1. Abyssinia. (_Cantuffa_ Gmel.). =Pterolobium= R.Br. Ovules 2 or more. Seeds placed transversely. 48 48. Fruit woody, not winged, 2-seeded, opening by two valves. Ovary short-stalked, 2-ovuled. Stigma peltate. Stamens hairy at the base. Petals unequal. Receptacle oblique.--Species 2. German East Africa. (Under _Peltophorum_ Vog.). =Bussea= Harms Fruit membranous or leathery. 49 49. Fruit winged at both sutures, indehiscent. Stigma broad-peltate. Filaments hairy at the base. Petals subequal, yellow. Trees--Species 1. Central Africa and northern South Africa. =Peltophorum= Vog. Fruit winged at one suture only or not winged. Stigma small, sometimes concave. 50 50. Fruit winged, indehiscent. Receptacle (calyx-tube) very oblique. Petals subequal, yellow. Stamens bent downwards.--Species 5. West Africa and Madagascar. =Mezoneurum= Desf. Fruit not winged. Receptacle not very oblique. 51 51. Fruit membranous, lanceolate, dehiscing in the middle of the valves. Seeds oblong. Sepals subequal. Petals oblong, subequal, yellow. Stamens erect, hairy at the base. Ovary short-stalked. Ovules 2-3. Trees.--Species 1 (_H. campecheanum_ L.). Cultivated in the tropics. Yields timber (log-wood), dyes, gum, and medicaments, and serves also as a garden-and hedge-plant. =Haematoxylon= L. Fruit leathery, dehiscing at the sutures or indehiscent. Seeds ovoid or globose. Petals yellow or red. Stamens bent downwards. Ovules few.--Species 10, of which 7 are natives of tropical and South Africa, 3 naturalized there as well as in Egypt and Madeira. They yield timber, tanning and dyeing materials, oily seeds, and medicaments, and are also used as garden-and hedge-plants. (Including _Guilandina_ L.). =Caesalpinia= L. 52. (39.) Anthers attached by the base or nearly so, rarely by the back, and then opening by apical pores. Seeds usually albuminous. [Tribe CASSIEAE.] 53 Anthers distinctly attached by the back, opening by longitudinal slits. Seeds usually exalbuminous. Trees or shrubs. 58