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Frangula alnus Frangula alnus Mill. Rhamnus frangula L. Rhamnus frangula L. ssp. columnaris hort. Rhamnus frangula L. var. angustifolia Louden Alder Buckthorn, Glossy Buckthorn, Breaking Buckthorn, Black Dogwood Alder buckthorn is native to Europe, Africa, and Asia. It was introduced to North America, where it has become naturalized. Frangula means “brittle wood,” and alnus means alders, which are often found in the same habitats. Alder buckthorn actually has no thorns, though relatives in the Rhamnus genus often do. In many areas it is considered an invasive. Identification: This shrub reaches 9½-20' (3-6 m). It usually has multiple stems, rarely only one, becoming a tree. Dark brown-black bark covers a light yellow interior bark. Leaves are roughly oval, 1-2½" (3-7 cm) long and ⅞-1½" (2.5-4 cm) wide. Leaves have prominent veins and stems ¼-½" (8-15 mm) long. Flowers are ¹/₁₆-³/₁₆" (3-5 mm), 5-petaled, yellowish- or greenish-white, and inconspicuous. Clusters of shiny black berries, reddish or purplish before ripening, are each ⅛-⅜" (6-10 mm) in diameter. Online References:
Frangula alnus on Wikipedia Frangula alnus on the USDA Forest Service's Fire Effects Information Database Frangula alnus on Invasive.org, Center for Invasive Species and Ecosystem Health Frangula alnus on Plants for a Future, a resource and information centre for edible and otherwise useful plants Frangula alnus at Harvard Forest Frangula alnus on Wikimedia Commons Frangula alnus on the Ecology of Commanster
9/14/2009 · Near Nashoba Hospital, Ayer, MA
7/25/2009 · J. Harry Rich Dirt Road, Groton, MA
7/27/2009 · Nashua River Rail Trail, Groton, MA Frangula alnus description by Thomas H. Kent, last updated 24 Feb 2012. © FloraFinder.com. All rights reserved. |
8/4/2009 · Near Nashoba Hospital, Ayer, MA
8/6/2009 · Nashua River Rail Trail, Groton, MA
9/14/2009 · Near Nashoba Hospital, Ayer, MA
8/4/2009 · Near Nashoba Hospital, Ayer, MA Range:
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