Also known as - European Buckthorn, Purging Buckthorn.
Not native to Alberta. Perennial.
By Gustave J. Yaki
Introduced from Europe. Shrub to small tree, 6m tall, planted ornamentally by city, but because it is weedy,
escaping into gardens and natural areas, SHOULD NOT BE PLANTED. Leaves, opposite, sub-opposite, or
occasionally alternate; rounded with sharp tip, finely-toothed, with 2-5 veins per side, arcing towards the
tip, 4-8cm long; remain green into November, long after native species have turned colour and dropped;
turn dark, many remaining on tree through the winter. Buds, almost black, long, scaly, pressed to the twig.
Twigs, slender, some ending in a sharp thorn. Bark, greyish-brown, birch-like with elongated horizontal
lenticels and loose ends of smooth bark forming tight curls. Flowers, in the leaf axils of new shoots; small,
inconspicuous, clustered, 4-parted, yellow-green, 4-5mm across; June. Fruits, a black berry, in short-stemmed
clusters; laxative when eaten. Habitat: escapes into moist to dry woods.
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Alexo Natural Area
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