92 



KEY TO THE FAMILIES AND GENERA 



57. CELASTRACEJE. 



A. Fr. indehiscent 1. Elxoden- 



AA. Fr. a dehiscent caps. \dron. 



B. Lvs. opposite. 



c. Ovules 1-2, in the axis of the locule 2. Etonymus. 



cc. Ovules 2, in the locules, erect 3. Pachystima. 



BB. Lvs. alternate. 



c. Ovary confluent with the disk. 



D. Locules generally 1-ovuled: plants un- 

 armed: fls. solitary, clustered or 



cymose 4. Maytenui. 



DD. Locules 2-ovuled: plants often armed: 



fls. cymose 5. Gymnos- 



\poria. 

 CC. Ovary free 6. Ceumtrut. 



Other genera treated are Cassine, Catha, and Tripterygium. 



58. STACKHOUSIACEJE. 

 In cultivation StackHmuia. 



59. RHAMNACE.S. 



A. Calyx-lobes persistent, the often star-shaped 

 disk joining its tube to the entire surface of 



the ovary: fr. dry, 3-winged 1. (louania. 



AA. Calyx-lobes deciduous. 



B. Disk lining the shallow calyx-tube nearly or 

 quite free from the ovary: fr. drupaceous, 

 mostly fleshy and often edible, with a 

 single 1-4-celled stone inclosing as many 

 seeds, or 1-seeded by abortion; seed-coats 

 membranous. 



c. Petals 0: endosperm copious, ruminate . . 2. Reynosia. 

 cc. Petals 5. 



D. Fr. winged, dry, leathery: plants 



prickly: [vs. 3-nerved 3. Paliurus. 



DD. Fr. a fleshy drupe: plants prickly: Ivs. 



3-nerved 4. Zizyphus. 



DDD. Fr. a drupe with leathery sarcocarp: 



plants unarmed : Ivs. penninerved .... 5. Berchemia. 

 BB. Disk lining the calyx-tube, or both adherent 

 to ovary: fr. drupaceous or becoming dry, 

 c. Lvs. very small or wanting, the spines lf.- 



like 6. Colletia. 



cc. Lvs. ordinary. 



D. Fr. a fleshy drupe free from calyx, con- 

 taining 2-^4 separate nut-like stones . . 7. Khamnus. 

 DD. Fr. becoming nearly or quite dry, 

 partly inferior, separating into 3 

 nutlets: ovary adnate to disk at its 



base 8. Ceanoth us. 



DDD. Fr. a caps, with membranous covering, 

 inferior, separating into 3 cocci, 



which are dehiscent inside 9. Pomaderris. 



DDDD. Fr. indehiscent, pea-shaped, 3-celled, 



3-seeded: ovary free 10. ffotettia. 



The genus Rhamnella is sometimes cultivated. 



60. VITACE.E. 



A. Stamens free: climbing shrubs or herbs. 

 B. Petals expanding; fls. in cymes: bark close; 



pith white. 



c. Plants climbing, mostly by adhesion of 

 dilated and disk-shaped tips of the 

 tendril-branches: no distinct disk or 

 free nectariferous glands, but a nec- 

 tariferous and wholly confluent thick- 

 ening of the base of the ovary, or even 



this obsolete: Ivs. never pinnate 1. Partkeno- 



CC. Plants climbing by the prehension and [cissus. 



coiling of naked-tipped tendrils: nec- 

 tariferous disk or glands surrounding 

 the ovary or its base, and at least partly 

 free from it. 

 D. Fls. 5-merous: woody plants, mostly 



-**& 2. Ampeloptis. 



DD. ris. 4-merous: more or less fleshy, 

 woody or herbaceous; mostly tropi- 

 cal or subtropical 3. Citrus. 



BB. Petals cast off from the base while cohering 

 by their tips; hypogynous disk or 5 

 nectariferous glands alternate with the 

 stamens; fls. in panicles: berries usually 

 edible: Ivs. rarely compound, never pin- 

 nate 4. Vitit. 



AA. Stamens with connate filaments: 4vs. 1-3-pin- 



nate: upright trees or shrubs 5. Leea. 



Tetrastigma is also briefly treated. 



61. SABIACEjE. 



In cultivation . Meliotma. 



62. ACERACEjE. 



A. Nutlets winged all around: Ivs. pinnate, with 



9-15 Ifts 1. Dipteronia. 



AA. Nutlets with an elongated wing on one side: 



Ivs. simple or compound 2. Acer. 



63. STAPHYLEACE.E. 



A. Lvs. opposite: several seeds in each cell. 

 B. Ovary 2-3-parted at base. 



c. Caps, vesiculose 1. Staphylea. 



cc. Follicles coriaceous 2. EuBcaphis* 



BB. Ovary 3-lobed: fr. fleshy or leathery 3. Turpinia. 



AA. Lvs. alternate: 1 seed in each cell: fr. berry- 

 like 4. Tapiscia. 



64. MELIANTHACEjE. 



A. Calyx subsaccate, the segms. narrow, very 



unequal at base : ovules in the locules 2-4. ... 1. Melianthus. 

 AA. Calyx of 5 free, roundish sepals: ovules 



numerous in 2 series on the placentae 2. Greyia. 



65. HIPPOCASTANACE.&. 



In cultivation 



66. SAPINDACE.S. 



A. Fls. irregular. 

 B. Ovules solitary in the locules (rarely 2 in 



Paullinia): plant climbing. 

 c. Fr. a winged samara ................... 1. 



cc. Fr. bladdery, membranous, loculicidal. ... 2. 



ccc. Fr. a pear-shaped, septicidal caps ........ 3. 



BB. Ovules 2 or more in the locules: plant erect. 

 c. Sepals valvate; petals 3-4 .............. 4. 



cc. Sepals imbricate; petals 4-5 ............ 5. 



AA. Fls. regular, or nearly so. 



B. Stamens inserted at the base of the ovary 



inside the disk, often unilateral. 

 c. Fr. dehiscent; ovules 2 or more in cells. 

 D. Disk produced into 5 horns; fls. in 

 racemes before the Ivs., showy ...... 6. 



DD. Disk annular or cup-shaped; fls. 



usually in panicles. 



E. Lvs. ternate: sepals glabrous; disk 

 cupular ....... ................. 7. 



EE. Lvs. pinnate. 



F. Petals 5; sepals imbricate, pubes- 

 cent ......................... 8. 



FF. Petals 0; sepals valvate .......... 9. 



cc. Fr. indehiscent. 



D. Aril present; fr. edible. 



E. Calyx deeply 5-parted, imbricate; 

 petals present ................... 10. 



EE. Calyx with small valvate lobes or 



oDsoletely toothed; petals ....... 11. 



DD. Aril wanting. 



E. Fr. deeply lobed or divided into 3 

 (-1) cocci: sepals 5: Ifts. usually 

 many .......................... 12. 



EE. Fr. not deeply lobed: sepals 4: Ifts. 



2-4 ............................ 13. 



BB. Stamens inserted outside the disk or disk 

 wanting; petals 0: caps, winged, papery 

 or leathery: Ivs. simple or pinnate ....... 14. 



Serjania. 

 Cardiotper- 



[mum. 

 Paullinia. 



Kalreuteria. 

 Ungnadia. 



Xanthoceras. 



Delavaya. 



Blighia. 

 fitadmannia. 



Euphoria. 



Liichi. 



SapinJux. 

 Melicocca. 



Dodonzea. 



Additional genera are somewhat cultivated, as Alectryon, Ber- 

 Rauio, and Diploglottis. 



67. ANACARDIACE^;. 



A. Lvs. simple 



B. Stamens 5; styles 3 1. Semecarpum. 



BB. Stamens 8-10 (all or some fertile); style 



eccentric; stigma a mere dot 2. A nacardium. 



BBB. Stamens 1-5; style lateral; stigma simple. 3. Mangifera. 

 AA. Lvs. pinnate or composed of 3 Ifts. 

 B. Ovary 1-celled. 



c. Ovules suspended at or near the apex. 

 D. Styles in the pistillate fls. short, in 



the staminate fls. 4-5 4. Tapiria. 



5. Cyrtocarpa. 



DD. Styles 3 6. Schinus. 



cc. Ovules suspended by a basilar funiculus. 



D. Styles 3 7. Putada. 



