By Mary Forrest
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Extra resources for Landscape trees and shrubs : selection, use and management
Sample text
When a plant is described what is known as a ‘type specimen’ is deposited in a herbarium, where it can be consulted by other botanists. Duplicate specimens may then be sent to other herbaria. Cultivar Cultivar refers to variations that have been selected in cultivation or in the wild and which have been vegetatively propagated by gardeners. 1, is named for the garden at Dawyck, near Edinburgh, Scotland. ’ before the name or with a single quotation mark either side of the name. As an example of cultivar names of importance to a landscape designer, Aucuba japonica has green leaves but the plant named A.
The shrubby genera treated here are native to Australia, Tasmania and New Zealand and to the Mediterranean. WORLD DISTRIBUTION. LEAVES. Foliage is evergreen, green, often thick, felted above and/or below, hence useful for maritime areas. In Ozothamnus, the foliage is often narrow with the margins of the leaves rolled inwards; in Santolina, it is linear, grey and scented. Flowers are small, grouped into a head known as a capitula. The individual flowers are inconspicuous but a conspicuous petal (strictly a ray or ligule), distinguished as disc flowers and ray flowers by Cullen (2001), occurs on most species.
Yellow flowers in upright racemes 20–30 cm long Mahonia ‘Charity’: foliage not as long as M. lomariifolia, with tall upright racemes, yellow flower. A hybrid of Mahonia japonica × M. lomariifolia, with the habit of the shrub more inclined to the latter. Mahonia japonica: wide-spreading racemes of yellow flowers. Mahonia aquifolium: short stumpy racemes of yellow flowers with pinnate leaves and good bushy habit, useful for ground cover FUNCTIONAL AND ORNAMENTAL USES. Barrier planting schemes Ground-cover schemes Mahonia ‘Charity’ B.