SAIMNDAt'K.K. 433 



lobed, rarely rudimentary or wanting. Styles 2, elongated, filiform, introrselv Ptigmatose 

 Nutlets l-a-seeded, each .suruK.uuted by a nioHtly ol)loug-ol.ii.|iie ..l)tiis(- vi-inv niorpliojogi- 

 cally a.-.oudiiig or widely sjjrea.ling d-.rsal wiug, wliith i« tliiikened and nerved on the 

 outer margin; seeds horizontal or iiscendiug, laterally c..m|.rcs«e.l ; en.hrvo varioaxly 

 oriented, with thin elongated spirally coiled or irregularly folded cotvledonH. 

 SuKOKOKK III. DODONMLK. Fruit (in ours) a septicidal ;5(-M)-wiiige,l capsule ; 

 seeds exalbuniinous. Flowers regular, apin-aring polygaiuous, l,ut l.y aLortiorl 

 dioecious. Petals, when present, of tlie same nunilMjr as tlie calvx-Iohes. Di.sk 

 (in ours) obsolete.- Erect shrubs ; tlie American witli simple altc-rnate oblong or 

 narrower leaves. 



3. DODON^A. Flowers small. Petals 0. Calyx 3-.5-lMl,ed. Stamens 5 to 8 or rarely 

 more numerous ; filaments sliort ; anthers innate. Carpels 3 or 4 ; styles united to or nearly 

 to the ape.\; ovary siiarply angled, .•J-4-eelled ; cells 2-ovuled ; placentae on the axis; the 

 upper ovule of each pair ascending, the lower pendulous. 



SuBOKDKK IV. SAPINDE.E. Flowers irregular or (in Sapindus) sub-regular, ain 

 pearing polygamou.s, but not truly perfect. Sepals or calyx-lobes 4 or 5. Petals 

 often of unequal number, tlie posterior one commonly reduced or absent. Disk 

 present, variously developed. Fruit capsular, or more or less deeply divided into 

 samaroid or rarely baccate carpellary lobes. Seeds exalbuininous. Leaves alter- 

 nate, pinnately oi- ternately compound. 



* Fruit a ;3-celled septicidal or septifragal capsule of mostly 3 samaroid carpels more or less 

 coherent about the axis: flowers irregular : shrubby clin'ibers. 



4. URVILLEA. Sepals 5. Capsule i)apery, 3-angled and 3-winged, septicidal or sej.ti- 

 fragal; wings tliin, of nearly equal breadtii from the base to the summit. Leaves teriiate. 

 Otlierwise ;is in the next. 



5. SERJANIA. Flowers zygomorphous. Sepals 5 (or 4). Petals 4, apjiendaged. Stamens 8. 

 Disk present, somewhat irregular, bearing 2 larger upper and 2 smaller lower glands. Fruit 

 with .-5 turgid at length separable seminiferous often reticulated or tomentulose lobes at the 

 summit, each extended downward along the axis into a semi-ovate or very rarely semi- 

 obovate or -oblanceolate wing. Inflorescences axillary and ternn'nal, pedunculate and sub- 

 tended by 2 or 3 recurved and coiling tendrils. Leaves mostly biternate. 



* * Fruit a bladdery inflated loculicidal capsule : teudriliferous herbaceous climber with 

 l)itornate leaves. Ovules solitary in the cells. 



6. CARDIOSPERMUM. Flowers zygomorphous. Sepals .5 or more commonly, by the 

 union of 2 of them, reduced to 4, these broad and very obtuse, in two unequal ])air.s. I'etals 

 4, alternating with the sepals, imbricated in the bud, each l)earing from near tiie ba.se an 

 irregular .somewhat unguiculate winglike or hooked appendage; the appendages of the 

 upper petals being larger. Disk extra-.stamineal, l)earing opposite each of the upper iH-tals 

 a short and rounded or long-cornute gland. Stamens 8, deflexed. Seeds exarillate, bbuk 

 with light-colored scar. 



* * * Fruit of I to (rarely) 3 indehiscent baccate wingless rounded carpellarv segments: 

 flowers regular or nearly so (sepals often somewhat unequal) : our species trees or erect 

 shrubs. 



-«— Ovules solitary in the cells. 



7. SAPINDUS. Sepals 5, obtuse, rarely petaloid. Petals usually of the same number, 

 more or less jmbescent, and bearing just above the short claw a villous or ciliated comli i>r 

 appendage. Disk annular, commonly crenate, bearing the 8 (to 10) stamens. Seeds ex- 

 arillate, with bony testa, black or nearly so. 



H— ■\~- Ovules 2 in each cell, but fruit 'l)y abortion 1-celled, 1-seeded. 



8. EXOTHEA. Calyx deeply .5-parted, tomentulo.se; segments roun(Ie<I, imbricated, at 

 length reflexed. I'etals .5, unnppendaged, slightly unguiculate. Ovary 2-celled ; ovules a 

 pair in each cell, collateral, somewhat i)en<lulous. Kruit 1-ceiled. I -seeded ; embryo with 

 very thick cotyledons and short radicle. 



