Vlii. KEY TO NATURAL ORDERS. 



* * Pistils 8 5, variously united. 



Pistils more or less united around a central 

 axis; carpels becoming 1-seeded 



and distinct in maturity GERANIACE*: 70 



Central axis not apparent. 



Carpels partly partitioned, each 2-seeded, 



the whole fruit capsular LINE^: 67 



Carpels simple, winged, 1-seeded. 



Samara 1, with 2 seeds BUTAOE^E 72 



Samaras 2, each 1-seeded SAPINDACE^E 72 



* * * Pistil one only; styles rarely 2 or 3. 

 Anthers opening by uplifted valves. 



Stamens 9, in 2 series; leaves aromatic LAUBINE^E 



Stamens 6 or 9, in 1 series; not aromatic BERBERIDE.E 7 



H- -i Anthers opening by terminal pores. 



Stamens 10; stigma broad ERIOACE^J 231 



H - +- Anthers opening by lateral slits. 



Flowers papilionaceous; fruit a legume LEGUMINOSE&: 



Flowers resembling the papilionaceous, but 



petals 3 only; pod 2 -celled POLYGALE.E 81 



Flowers regular; calyx and corolla both 



present. 



Petals 5, unguiculate, the limb cucullate. . .KHAMNEJE 74 



Petals, stamens and capsule-valves 4 or 



5; seeds covered by a red aril CELASTRINEJE 74 



Flowers 5-merous; fruit a single small 



drupe ANACARDIACE^B 73 



Petals 4 or 5; stamens 58; capsule 3- 

 celled, by abortion 1-seeded, 



Hippocastanum in SAPINDACE^E 73 



Petals 4 or 5, united at apex; calyx minute. . SARMENTOS.E 

 Calyx tubular; petals long-clawed. 



Placentae parietal FRANKENIACEJE 38 



Placenta central CARYOPHYLLE^E 30 



Sepals and petals 4 each; stamens 6, 



tetradynamous CRUCIFER^: 13 



Petals 5, deciduous; sepals 2, persistent; 



capsule 3-valved, 1-celled . . .PoRTUtACEjE 58 



Petals and sepals 4 or 5 each, the latter per- 

 sistent; capsule 1-celled, 410- 

 valved or -toothed; placenta cen- 

 tral.... . . CARYOPHYLLE/E 30 



