Tuesday, March 3, 2009

Burnet Rose

By Marie Austin

Blackthorn is a densely branched thorny shrub growing to a height of 1-5 m. The bark on the stem is blackish-brown and the lateral twigs have a terminal spine. The buds are small and ovate; the flower buds arc generally borne in dense clusters on short twigs. The whitish flowers appear in April -- May before the leaves. The fruits, known as sloes, ripen in September-October and are astringent, becoming tastier after the first frosts. The brown, pitted seed is difficult to separate from the pulp.

Its widespread distribution extends from central Europe across the Ukraine and Siberia to China. It grows mostly in warmth-loving plant communities on rocky (especially limestone) banks with sunny aspect, but also does well on coastal sand dunes. It is a widely variable species, the many varieties including ones with rich yellow or salmon pink flowers and also one with double blooms. Because of its ornamental leaves and small size it is often planted in parks and in hedges. Propagation is chiefly by means of cuttings and root suckers. Fairly plentiful in the mountains of central and southern Europe is the related species R. pendulina (alpine rose) with sparse covering of thorns on the bottom part of the stem, bright red flowers and round, light red hips.

The medlar is a broad-spreading shrub or small tree, 3-6 m in height. The stem may be as much as 20 cm in diameter. The shoots are felted grey- brown, older branches are grey and covered with short, solitary spines. The fruits are apple-shaped, 3 cm across, flattened at the top and terminated by long sepals. When ripe, they turn brown and contain 5 hard angular seeds.

The Japanese quince is a thorny shrub with several main stems reaching 1-2.5 m. One-year shoots are glossy greenish brown, older ones dark brown. The buds are squat and reddish, the flower buds twice as large as the leaf buds. The pink to dark red flowers, about 4 cm in diameter, appear from December to April, the earliest ones appearing before the leaves. The yellow ovoid fruits, without any sepals, ripen in autumn and remain on the shrub until winter.

Nowadays it is widely cultivated in western and central Europe for its large, decorative and fragrant flowers, and it is completely frost-resistant. This species also includes varieties with double red as well as white blooms, e.g. aubro-plena', 'Alba' and `Albo-plena'. This rose has been crossed with other roses to produce several ornamental hybrids and varieties.

It produces a great many root suckers, thereby spreading to form large groups and thickets. In some parts of Europe it has become naturalized. The hips are rich in Vitamin C.

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