Tuesday, October 25, 2011

TRILLIUM

This striking group of 30 rhizome-rooted, spring-flowering, woodland perennials from North America and temperate Asia is the type genus for its family, the Trilliaceae. The genus name is derived from tri-lilium, 3-part lily, because the leaf and floral parts are grouped in 3s. Although ranging from the tiny Trillium rivale at just a couple of inches high through to species that are 24 in (60 cm) tall in flower, the genus is remarkably consistent in form. The leaflets are bright green, often silver- or purple-mottled, and usually broadly oval, tapering to a point. At the center of the 3-leaf cluster is a simple 3-petalled flower that may be white, cream, pink, or deep maroon.


CULTIVATION


Plant Trillium species in part- or full shade in cool, moist, humus-rich, well-drained soil. All species die away completely in autumn but quickly return to growth in early spring, often flowering before the equinox. The common name of wake robin comes from this early flowering habit-it is supposedly the plant that wakes the robin in spring. Propagate by division of the rhizomes after flowering, or from seed. 


Top Tip


Trillium species are best planted under trees and large shrubs where the conditions match their native habitat. Once established, they require very little attention.

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