406 NATURAL HISTORY OF PLANTS. 



convex or conferruminate ; radicle incurved or nearly straight in- 

 ferior. — Trees or shrubs sometimes scandent, cirrhous or ecirrhous ; 

 leaves alternate, pinnate or 3-foliolate ( Thinouia), sometimes 1 -foliolate ; 

 flowers in small cymes-; cymes in compound or sometimes [Tkinoua) 

 short subcapitate racemes. {Trap. America}) 



29. Atalaya Bl.^ — Flowers regular polygamo- dioecious ; sepals 

 5, uneqiial, imbricated. Petals alternate 5, at base within penicillate 

 or furnished with scales. Stamens 8, 9, central, interior to com- 

 plete annular disk ; filaments free, equal or unequal erect ; anthers 

 oblong iatrorse, 2-rimose. Germen (in male flower rudimentary) 

 •central ; style short, stigmatiferous 3 -agonal at apex ; ovule solitary 

 in cells ascendent at middle of inner angle ; micropyle extrorsely 

 inferior. Fruit 3 samaree, dry long winged at back, solute from 

 axis indehiscent. Seed ascendent ; testa coriaceous ; cotyledons of 

 exalbuminous embryo unequal thick plano-convex ; radicle short 

 inferior. — Glabrous trees or shrubs; leaves alternate pinnate; 

 folioles CO, or sometimes more rarely 1-3 ; petiole and rachis some- 

 times dUated-foliaceous ; flowers ^ in ramified compound-cymiferous 

 axillary and terminal racemes.* {Trop. and subtrop. Oceania.^) 



30 ? Ptseroxylon Eckl. and Zeth.^ — Flowers polygamo-dioe- 

 cious (nearly of Melicocca or Atalaya) regular ; sepals 4, small and 

 petals same in number, alternate longer, imbricated. Stamens 4 

 (eflfete in female flower) alternipetalous : filaments interior to 4- 

 crenate disk ; anthers introrse, 2-rimose. Germen (rudimentary in 

 male flower) 2-locular ; style branches 2-capitellate stigmatiferous at 

 apex ; ovules ascendent ; micropyle extrorsely inferior. Capsule 

 coriaceous samaroid compressed, obcordate, produced at apex to 

 2 thick rigid obtuse wings, looulicidally 2-valved, finally 4-partite. 

 Seeds subereot, produced above to long vertical wing; albumen 

 thin fleshy ; cotyledons of curved embryo large compressed ; radicle 



' Spec. 10-12. H. B. PI. ^quin. t. 56.— pighia. 



H. B. K. Nov. Gen. et Spec. v. 123.— A. S. H. = Spec, about 6. DC. Proclr. i. 608, n. 13 



Fl. Bras. Mer. ii. 384.— Griseb. Fl. Brit. W.- (Sapindus). — Done. Berb. Timor. 115 {Oupania). 



Ind. 126; Cat. Fl. Oub. 46.— Walp. Rep. i. 420 —A. Rich. Voy. Astral. Bot. 31, t. 12 {Tkou- 



(part.) ; v. 365; A' n. vii. 628. inw).— Benth. Fl. Austral, i. 462 (part.).— F. 



2 Stimphia,m. 186. — B. H. Qen.iOl n. 30. Muell. Fragm. i. 46, 98 ( rAowma). —Walp. 



' Small or rather large, white. Ann. vii. 628. 



* Flower nearly of Triceros ; samaras nearly ^ Eckl. et Zeth. Fkrnn. 64.— Endl. Gen. n. 



of Thouiiiia, Pssudatalaya, Acer, or some Mai- 5636. — B. H. Qm. 411, n. 66. 



