FAM. 106, 107, 108. 87 



106. Aesculaceae Hippocastanaceae), Buck-eye Family. 



Shrubs or trees with opposite, exstipulate, palmately- 

 compound loaves; flowers in terminal racemes or pani- 

 cles, polygamous, irregular and unsymmetrical; calyx 

 5-lobed, with an annular, hypogynous disk; petals 4-5 

 unequal; stamens 5-S; ovary 3-celled, with 2 ovules in 

 each cell; fruit a coriaceous capsule, loculicidally 3-valved; 

 seed mostly solitary with a leathery testa. 



Aesculus Pavia, Red Buck-eye. Shrub with smooth bark; leaflets 5-7, the 

 leaflets oblanceolate, short-acuminate, finely serrate; flowers in a panicle, red; claws 

 of the upper petals villous and as long as the blades, those of the lateral petals winged, 

 several times longer than the blades; stamens slightly exserted; capsule unarmed. 

 Rich soil. Late Spring. 



107. Aceraceae, Maple Family. 



Trees or shrubs with opposite, exstipulate, palmately- 

 lobed leaves; flowers regular, mostly polygamous or dioe- 

 cious; calyx 4-9 lobed, often colored; petals as many as 

 the calyx-lobes, or none; stamens as many as the sepals, 

 often 8; ovary free, 2-celled, with 2 ovules in each cell; 

 styles united, stigma 2-cleft; fruit a double, 2-seeded sa- 

 mara. 



1. Leaves simple, palmately lobed; flowers polygamous, clustered or 



racemose; — calyx 4-5. rarely 6-9 lobed; petals 5-S. or none. Acer, UfapU 



A. rubrum, Red Maple. A tree with pale bark; leaves shallowly 3-5 lobed; 

 flowers appearing before the leaves, in dense, red or yellowish clusters; sama- 

 ras drooping, red, with long pedicels. Low ground and planted. Early 

 Spring. 



A. Floridanum. A tree with white bark; leaves with 3-5 obtuse few-toothed 

 lobes; flowers appearing with the leaves, umbellate; calyx campanulate; 

 fruit green. River-swamps. Spring. 

 1. Leaves pinnately-compound; flowers dioecious, the sterile ones in 

 drooping clusters, the fertile in drooping racemes; — calyx min- 

 ute, corolla wanting. ______ Rulac, Box-elder 



R. Negundo (Negundo aceroides). Tree with light green foliage, leaves 3-9 

 foliate; flowers appearing before the leaves; samaras drooping, light green. 

 Riverbanks. Spring. 



108. Sapindaceae, Soapberry Family. 



Trees, shrubs or herbs, erect or climbing; leaves oppo- 

 site or alternate, usually stipulate, simple or pinnately 

 compound; flowers in racemes, panicles or corymbs; calyx 

 ■1-5 [obed, with an entire or lobed hypo- or perigynous disk; 

 petals 4-5, or none; stamens 5 or 8-15; ovary 2-4 celled 



