HlPPOCASTANACEAE. 



127 



AESCULUS. Buckeye. Horsechestnut. 



Usually ovoid deciduous trees, but sometimes shrubs, with 

 more or less soft-corky gray or dark bark; pale rather soft 

 wood with minute diffused ducts and extremely fine medullary 

 rays ; stout terete twigs ; large somewhat hexagonal homogene- 

 ous pale pith ; large dig'tate leaves ; large opposite shield-shaped 

 leaf-scars with 3 or several bundle-traces in a single series ; 

 ovoid buds, the terminal large, with several pairs of exposed 

 opposite scales; perfect paniculate showy polypetalous flowers; 

 and leathery capsules with I or several very large roundish 

 seeds. 



1. Buds gummy: leaflets subsessile, impressed-veiny. 



(Horsechestnuts). 2. 

 Buds not gummy. (Buckeyes). 12. 



2. Buds persistently gummy : leaflets often seven. 3. 

 Bud-scales less persistently gummy, margined leaf- 



lets usually 5. 



3. Trees. 4. 

 Shrubs. 



4. Leaves unvariegated. 5. 

 Leaves variegated, n. 



5. Leaflets merely toothed. 6. 

 Leaflets deeply cut. 9. 



6. Tree with ovoid top. 7. 

 Tree with round top. 

 Tree pyramidal. 



/. Flowers single. 

 Flowers double. 8. 



8. Flowers yellowish red. 

 Flowers white. 



9, Tree with ovoid top. 10. 

 Tree rather pyramidal. 



ic. Leaflets of usual outline. 



Leaflets short and broad. 

 11. Variegation yellow. 



With white blotches. 



X A. carnea. 

 A. Hippocastanum pumila. 



A. Hippocastanum umbraculifera. 

 A. Hippocastanum pyramidalis. 

 A. Hippocastanum. 



A. Hippocastanum Schirnhoferi. 

 A. Hippocastanum Baumannii. 



A. Hippocastanum Henkelii. 

 A. Hippocastanum laciniata. 

 A. Hippocastanum incisa. 

 A. Hippocastanum variegata. 

 A. Hippocastanum Memmingeri. 



