Alberta Invasive Plant Identification Guide
Alberta Invasive Plant Identification Guide
Alberta Invasive Plant Identification Guide
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Permission granted by e-mail on June 28, 2011 by Gary Fewless<br />
•Information: Originated from Eurasia, introduced as an ornamental<br />
plant, tolerant of a wide range of conditions.<br />
•Life Cycle: Perennial woody shrub.<br />
•Root: Woody root.<br />
Buckthorn, Common<br />
Rhamnus cathartica, Rhamnaceae<br />
Category: Prohibited Noxious<br />
•Leaves: Dark green, glossy, oval shaped, pointed tip, 3-4 veins, slightly<br />
jagged edges.<br />
•Stems: Shrub or small tree, trunk up to 25cm in diameter, up to 7m tall,<br />
grey-brown, rough texture, twigs tipped with a spine.<br />
•Flower: Yellow/ yellow-green, 4 petals, male and female flowers on separate<br />
plants.<br />
•Seed/Fruits: Small black fruit, 3-4 seeds.<br />
•Control: Mechanical, basal bark treatment.<br />
16<br />
Jan Samanek, State Phytosanitary Administration, Bugwood.org
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