Cynanchum louiseae Kartesz & Gandhi Cynanchum nigrum (L.) Pers. non Cav. Vincetoxicum nigrum (L.) Moench Black swallowort, Louise’s swallow-wort
Black swallow-wort is native to Italy, France, Portugal, and Spain. It is an invasive in North America, where it initially escaped from a botanical garden in 1854. Identification: These vines have oval-shaped leaves with pointed tips, 3-4" (7.6-10 cm) × 1-2" (2.5-5 cm) wide, growing in opposing pairs along the vine. They reach heights of 6' (1.8 m). Small ⅛-¼" (3.2-6.3 mm) star-shaped flowers are dark purple to nearly black, with white hairs, and occur in clusters of 1-5. Fruits are slender and tapered, 1-3" (2.5-7.6 cm) long and ¼" (6.3 mm) wide, resembling those tiny hyperatomic peppers that spice up many Asian dishes. Older fruits turn from green to brown. Photo by urtica on Flickr (Jenn Forman Orth). Flowers are about ¼" (6.3 mm) across. Online References:
Cynanchum louiseae on Discover Life Cynanchum louiseae on the Plant Conservation Alliance’s Alien Plant Working Group Least Wanted List Cynanchum louiseae on the Connecticut Botanical Society's Connecticut wildflowers site Cynanchum louiseae on Kansas Wildflowers and Grasses Cynanchum louiseae on Invasive.org, Center for Invasive Species and Ecosystem Health Cynanchum louiseae on Forestry Images Cynanchum louiseae on the USDA Forest Service's Fire Effects Information Database 10/2/2010 · Wiccopee, NY 9/19/2013 · Harvard, Massachusetts Cynanchum louiseae description by Thomas H. Kent, last updated 25 May 2020. © FloraFinder.org. All rights reserved. |
10/2/2010 · Wiccopee, NY 9/19/2013 · Harvard, Massachusetts 10/2/2010 · Wiccopee, NY 9/19/2013 · Harvard, Massachusetts 10/2/2010 · Wiccopee, NY Range:
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