Horse Chestnut (Æsculus Hippocastanum) and others: carnea, Pavia, parviflora, flava.

Ailantus glandulosa (Tree of Heaven).

Amelanchier vulgaris and A. canadensis.*—Very ornamental. Seldom seen, but as free-growing and flowering as the Hawthorn. The popular name for these beautiful trees is Snowy Mespilus.

Aralia spinosa and A. chinensis.*

Arbutus Andrachne.—Flowers in February and March.

Arctostaphylos alpina.—Plenty of this found in north of Scotland, but somewhat difficult to establish in gardens. A. Uva-ursi.—Freer in growth than the preceding. Both species are low-creeping shrubs suitable for planting with Heaths in peat.

Aristolochia Sipho (Dutchman's Pipe).—Large effective climber.

Artemisia Abrotanum, arborescens, and tridentata.*—Useful shrubs of grey tone.

Aucuba japonica and varieties.*

Azara microphylla* and A. dentata.