166 NATURAL HISTORY OF PLANTS. 
10. Acrocarpus Wiaut.—Flowers subregular; receptacle cam- 
panulate, lined by a disk; calyx and corolla subregular. Sta- 
mens 5, alternipetalous equal exserted. Germen central stipitate 
oo-ovulate; style short inflexed; stigma small terminal. Legume 
elongated o-seeded, on very long stalk. Seeds... ?—An un- 
armed tree; leaves large 2-pinnate ; leaflets ovate acuminate her- 
baceous; flowers expanding before leaves, rather large, racemose ; 
racemes solitary axillary, or in twos or threes at extremities of 
branches; bracts and bractlets small caducous (Hast Indies). 
See p. 81. 
11. Wagatea Da1z.—Flowers subregular (of Cesalpinia) ; recep- 
tacle long, campanulate or subtubular, lined by a disk; calyx and 
corolla subregular inbricated. Stamens 10, free, markedly peri- 
gynous. Germen inserted in bottom of receptacle, free oo-ovulate ; 
style subclavate at apex; stigma concave oblique sub-2-labiate. 
‘“‘Legume oblong-linear acute coriaceous, transversely depressed 
between seeds; sutures thickened. Seeds obovate-oblong ; testa thick 
bony; radicle very short, straight.”—High climbing prickly 
shrubs; leaves 2-pinnate; leaflets numerous; flowers in long 
simple or branched spikes; rachis thick, pitted at insertion of each 
flower ; bracts small caducous (Last Indies). See p. 81. 
12. Pterolobium R. Br.—Flowers subregular ; receptacle slightly 
concave, lined by a disk. Sepals 5, imbricated. Petals 5, imbri- 
cated. Stamens 10, free; anthers introrse 2-rimose. Germen 
central sessile, 1-2-ovulate ; style short or long; apex truncate or 
concave, stigmatiferous. Legume sessile compressed samaroid 
indehiscent 1-seeded ; placentary margin oblique, produced into a 
membranous, oblong or falcate wing. Seed descending compressed ; 
embryo exalbuminous ; cotyledons flattened ; radicle short straight.— 
Trees or high climbing shrubs, prickly; leaves 2-pinnate; stipules 
small or 0; flowers in loosely-branched terminal racemes ; bracts 
very caducous; bractlets 0 (Zropical Asia, Africa, and Australia). 
See p. 82. 
18. Barklya F. Murii.—Flowers subregular (of Pterolobium) ; 
receptacle cupuliform, lined bya disk. Calyx gamosepalous, shortly 
toothed, imbricated. Petals subequal with rather long claws; 
