168 NATURAL HISTORY OF PLANTS. 



and (on same tree) simply paripinnate ; flowers in simple or 

 fascicled or compound cymuliferous, axillary or lateral, racemes 

 (North America, temperate and subtropical Asia). See p. 84. 



III. SCLEROLOBIE^. 



16. Sclerolobium Vog. — Flowers hermaphrodite subregular ; re- 

 ceptacle cupuliform or shortly obconical, lined by a disk ; mouth 

 evenly or obliquely truncate. Sepals 5, subequal imbricated. Petals 

 5, equal or slightly unequal, membranous imbricated, with highest 

 petal innermost (Cosymbe) ; or else thin linear unequal. Stamens 10, 

 inserted with perianth ; filaments free, pilose at base, inflexed or folded 

 in aestivation ; anthers uniform introrse, longitudinally 2-rimose. 

 Germen central stipitate, inserted in bottom of receptacle, straight 

 or oblique, cc-ovulate; ovules descending 2-seriate; micropyle ex- 

 trorse superior ; style terminal slender ; apex stigmatiferous, truncate 

 or scarcely dilated. Legume shortly stipitate piano-compressed 

 1- oo-seeded indehiscent ; exocarp often separable from thin sub- 

 ligneous endocarp. Seeds large, orbicular or reniform ; embryo 

 exalbuminous ; cotyledons leaf-like, cordate at base ; radicle short 

 straight. — Trees ; leaves impari- or paripinnate ; stipules minute or 0, 

 more rarely leaf-like 1-3-foliolate ; flowers small numerous in much- 

 branched terminal racemes ; bracts small caducous (Tropical America). 

 See p. S5. 



17. Diptychandra Tul. — Flowers of Sclerolobium ; sepals and 

 petals 5, imbricated. Stamens 10 (of Sclerolobium). Grermen central 

 stipitate pauciovulate ; style slender inflexed ; stigma terminal, trun- 

 cated or slightly dilated. Legume shortly stipitate, short or elon- 

 gated, piano-compressed, bare within, 2-valved ; valves coriaceous ; 

 margins nerviform. Seeds 1-3, transverse, orbicular or reniform, 

 much compressed ; testa expanded into a marginal wing ; embryo 

 exalbuminous ; cotyledons flat ; radicle short straight. — Unarmed 

 trees or shrubs ; leaves pari- or sub-imparipinnate ; leaflets with 

 pellucid dots ; stipules minute or ; flowers in loose axillary and 

 terminal racemes ; bracts very caducous (Brazil, Bolivia). See 

 p. 87. 



18. Pcsppigia Presl. — Flowers of Diptychandra ; receptacle sub- 



