66 Staphyleaceae, Hippocastanaceae 



deciduous. Flowers small, often green, 4-5-merous, 

 mostly hermaphrodite. Disc usually conspicuous. Petals 

 imbricate. Stamens 4-5, inserted on the disc. Carpels 

 (2-5) each with 00 -i ovules. Fridt a capsule or berry. 

 Seeds often arillate. 



Only British genus (leaves opposite, carpels iso- 

 merous): Euonymus. 



*Fam. 5. Staphyleaceae. Shrubs or trees. Leaves 

 usually opposite and pinnate, often with stipules and 

 stipels. Flowers in panicles, 5-merous. Stamens 5, in- 

 serted outside the disc. Carpels (2-3), free above. 

 Ovules CO -few. Fruit capsular. Embryo straight. 

 Endosperm copious, fleshy. 



Capsule inflated. *Staphylea. 



Suborder 4. Sapindineae. Flowers heterochlamy- 

 deous, typically diplostemonous but some stamens and 

 carpels abort, actinomorphic or obliquely zygomorphic. 

 Ovtdes with two integuments. 



Fam. 6. Aceraceae. Trees. Z^^^^j opposite, simple, 

 lobed or pinnate, exstipulate. Flowers actinomorphic, 

 axis flat or concave. K and C 4-10. A 4-10, usually 8. 

 G (2) each with two almost orthotropous ovules. Fruit 

 indehiscent, winged, usually i -seeded. No e?idosperm. 



Only British genus (fruit wings lateral) : Acer. 



*Fam. 7. Hippocastanaceae. Trees. Leaves 

 opposite, palmate, exstipulate. Flowers in conspicuous, 

 primarily racemose inflorescences, obliquely zygomorphic. 

 K 5. C 4-5. A 5-8. G (3) each with two ovules. 

 Capside i-seeded, 2-3-valved. No endosperm. 



Only British genus (calyx tube long) : *Aesculus. 



Suborders. Balsaminineae. Z7<?2£/^r.yheterochlamy- 



deous, zygomorphic, haplostemonous, with united anthers. 



