240 xlvii. § papilionaceje (baker). [Pterocarpus. 



the base, subacute, glabrous above, often at first finely pubescent below. 

 Flowers in copious panicles with 20-30-flowered racemose branches. 

 Pedicels and obconical calyx finely grey-pubescent, the latter 2£ lines 

 long- with short subdeltoid teeth. Corolla bright yellow, twice the calyx, 

 the standard orbicular, f in. broad, purple on the back, the upper sta- 

 men free or connate at the base. Pod round, 2-3 in. broad when fully 

 developed, the membranous wing rather broader than the densely 

 echinate disk ; style lateral or deflexed ; pedicel about as long or twice 

 as long as the calyx. — Guill. et Perr. Fl. Seneg. 229 t. 54. P. Adansonii, 

 angolensis, and echinatus, DC. loc. cit. 



Upper Guinea. Senegambia, Heudelot! Perrottet! Niger country, Barter I 



Lower Guinea. Angola, Dr. Welwitschl 



Produces the African gum Kino, and the wood much used. See R. Brown's re- 

 marks on Oudney's Travels, p. 29, and Hooker in Gray's Travels in West Africa, p. 395. 

 It flowers in November and December, and the seeds are ripe in May. 



77. OSTRYOCARPUS, Hook. f. ; Benth. et Hook. f. 

 Gen. Plant, i. 518. 



Calyx tubular-campanulate, the teeth short, deltoid. Standard broad- 

 rhomboidal, recurved, exappendiculate ; wings falcate- oblong; keel 

 oblong, incurved, obtuse, its petals joined along the back. Upper sta- 

 men free from the base, the others connate ; anthers versatile. Ovary 

 sessile, pauciovulate ; style filiform; stigma small, terminal. Pod 

 orbicular, compressed, indehiscent, coriaceous, not winged, the style 

 terminal. Seed one. — Climbing shrubs. 



Two species, restricted to West Tropical Africa. 



Leaflets 5 1. 0. riparius. 



Leaflets 17-31 2 - 0. Welwitschn. 



1. O. riparius, Hook. f. Fl. Nigr. 316. A wide-climbing shrub, 

 sometimes 40 ft. long, the young twigs slightly ferruginous-pubescent. 

 Petioles 2-4 in. long, woody, glabrous, the rachis rather longer ; leaf- 

 lets 5, lateral ones opposite, short- stalked, the terminal one obovate- 

 oblong, 4-8 in. long, both ends rounded, coriaceous, glabrous, the veins 

 not raised. Flowers in ample panicles with numerous narrow many- 

 flowered racemose branches. Pedicels very short. Calyx 2 lines deep, 

 glabrous. Corolla yellowish, twice as long as the calyx. Pod 2 in. 

 each way, flat, rigid, glabrous, coriaceous. — Benth. 1. c. 85. 



Upper Guinea. Senegambia, Heudelot! Sierra Leone, Don! Vogel! Guinea 

 proper, Mann ! Fernando Po, Vogel ! 



2. O. ? Welwitschii, Baker. A wide-climbing shrub ; branches 

 glabrous with a few inconspicuous spines. Petioles slender, gla- 

 brous, 2-2|in. long; leaves 9-14 in. long, with 17-31 elliptical 

 glabrous unequal-sided opposite leaflets, central one 1J-3 in. long by 

 8-12 lines broad, on patent petiolules 1-1 \ lines long, deciduous when 

 the plant is in flower. Flowers in dense ascending racemes 4-5 in. 

 long on short peduncles. Pedicels 1-1| lines long, ascending, velvety, 

 often fascicled. Calyx 2 lines deep, campanulate, silky, the deltoid 



