Tuesday, March 3, 2009

Ivy

By Mark Carlson

Alpenrose is a densely branched, evergreen shrub growing to a height of 0.4-1 m. The glowing flowers appear in June and July. The capsules ripen and split at the end of September.

This shrub is a native of eastern Europe and Siberia, its range extending eastward to northern China and Korea. In this arm it grows mainly in the valleys of large rivers, where it can be one of the main species in the shrub layer of riverine woods. In central and western Europe it is planted in parks as a shrub beneath groups of trees.

Both the red twigs and white fruits are very ornamental. A completely frost-resistant species, it tolerates shade and the smoke-laden atmosphere of large cities. Propagation is by suckers and cuttings. Also planted in parks is the closely related species Cornus stoloniferaMichx. (C. sericea. L.) of America, which is readily propagated by means of the drooping branches which take root easily. This dogwood has white flowers and small, round, white drupes containing a single, hard, ribbed seed.

The fruits ripen in September; they are edible but turn sweet only after the first frost. Inside the pulp is a hard, elongate seed which, when sown, does not germinate until the second year.

It is widespread throughout western, central and eastern Europe. It stands up well to strong shade and forms the lower shrub storey in riverine woods and mixed broad-leaved forests in hilly country. Though it generally grows on fresh to moist soils it thrives quite well in dry soils and in England can form dense scrub on chalk; it also occurs widely in hedges. Because of its widespreading root system and profusion of root suckers it is sometimes planted on steep banks to hold the soil.

It is readily propagated by means of seeds and winter cuttings. Because it stands up well to clipping, L. vulgare is a popular plant for hedges growing up to 2 m high, but, once widely used, has now been almost completely replaced for this purpose by the Japanese privet, L. oz;alifolium. In parks it is planted in shrubbery borders and as a shrub layer beneath groups of trees.

About the Author:

0 comments: