Horse chestnut, Æsculus Hippocastanum.†‡ Useful for single specimens and roadsides; many forms.

Buckeye, Æ. octandra (Æ. flava)*‡

Ohio buckeye, Æ. glabra*

Red buckeye, Æ. cornea (Æ. rubicunda).

Ailanthus, Ailanthus glandulosa. A rapid grower, with large pinnate leaves; the staminate plant possesses a disagreeable odor when it flowers; suckers badly; most useful as a shrub; see the same under Shrubs (also Fig. 50).

Alder, Alnus glutinosa. The var. imperialis‡ is one of the best cut-leaved small trees.

European birch, Betula alba.

Cut-leaved weeping birch, B. alba var. laciniata pendula.‡

American white birch, B. populifolia.*

Paper, or canoe birch, B. papyrifera.*