40(i NATURAL HISTORY OF PLANTS. 



convex or confernmiinate ; radicle incurved or nearly straight in- 

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

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

 flowers in small cymes ; cymes in compound or sometimes ( Thinoua) 

 short subcapitate racemes. {Trop. America.^) 



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

 5, imequal, 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 introrse, 2-rimoso. 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 samarœ, dry long winged at back, solute from 

 axis indéhiscent. Seed ascendent ; testa coriaceous ; cotyledons of 

 exalbumiuous 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 dilated-foliaeeous ; flowers ^ in ramified compound- cymiferous 

 axillary and terminal racemes."* {Trop, and suhtrop. Oceania.^) 



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

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

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

 (effete in female flower) alternipetalous ; filaments interior to 4- 

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

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

 apex ; ovules ascendent ; micropyle extrorsely inferior. Capsule 

 coriaceous samaroid compressed, obcordate, produced at apex to 

 2 thick rigid obtuse wings, loculicidally 2-valvcd, finally 4-partite. 

 Seeds suborect, produced above to long vertical wing; albumen 

 thin fleshy ; cotyledons of curved embryo large compressed ; radicle 



' Spec. 10-12. H. B. PI. ^quin. t. 66.— pighia. 



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



Fl. Bras. Mer. ii. 384.— Griseb. FI. Brit. W.- (SapiNdi<.i).—T)cNE. Herd. Timor, lir, {Cupania). 



Ind. 126; Cat. PI. Cub. 46.— W alp. Rep. i. 420 —A. Rich. Voij. Astrol. Bot. 31, t. 12 {TJioii- 



(part.) ; v. 365; An. vii. 628. («(V/).— Benth. Fl. Amtral. i. 462 (part.).— F. 



2 ii:»»y)/i;ir, iii. 186.— B. H. (?CH. 401 n. 30. Muell. Frngni. i. 46, 98 (T'/jOMmm).— Walp. 



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



* Flower nearly of Triceros ; samaras nearly " Eckl. et Zeyh. Enum. 54. — Endl. Gen. n. 



of T/iouiiiia, Psuudatalai/a., Acer, or some Mai- 5636. — B. H. Oen, 411, n. 66. 



