Vincetoxicum rossicum at the Skaneateles Conservation Area
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Gentianales: Apocynaceae: Vincetoxicum rossicum, pale swallow-wort is a very highly invasive exotic relative of common milkweed. It has become quite common on the Federal Farm section of the conservation area. Besides enveloping and displacing native plants, it is reported to be attractive to monarch butterflies as an alternative egg-laying site. However, only milkweed species will support the monarch larvae, so eggs deposited on swallowwort are wasted.