more or less soft-corky gray or dark bark; pale rather 
HIPPOCASTANACEAE, 
AESCULUS, 
Buckeye. 
127 
Horsechestnut. 
Usually ovoid deciduous trees, but sometimes shrubs, with 
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. 
Buds gummy: leaflets subsessile, impressed-veiny. 
lie 
Ni 
Ic. 
Um iF 
(Horsechestnuts). 2. 
(Buckeyes). 
. Buds persistently gummy: leaflets often seven. 3. 
Buds not gummy. 
12, 
Bud-scales less persistently gummy, margined :leaf- 
lets usually 5. 
. Trees. 4. 
Shrubs. 
. Leaves unvariegated. 5. 
Leaves variegated. II. 
Leaflets deeply cut. 9. 
. Tree with ovoid top. 7. 
Tree with round top. 
Tree pyramidal. 
. Flowers single. 
Flowers double. 8. 
. Flowers yellowish red. 
Flowers white. 
. Tree with ovoid top. 10, 
Tree rather pyramidal. 
Leaflets of usual outline. 
Leaflets short and broad. 
Variegation yellow. 
With white blotches, 
b, dels. 
carnea. 
A. Hippocastanum pumila. 
. Leaflets merely toothed. 6. 
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. 
