Kathy,
 
          I haven't checked my list of native and naturalized vines yet but in addition to the Milkweed Family species I mentioned in the earlier e-mail, there are at least 3 vines with large heart shaped leaves. Two, one native and one naturalized, in the genus Ipomoea of the Morning Glory Family and one in the genus Aristolochia (Pipe Vine) of the Birthwort Family. None of these should have milky sap. The Pipe Vine is a large woody vine. All the others are either annual or perennial herbaceous vines.
 
                                                            Joe

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To: WorthleyBotany@yahoogroups.com
From: kathy@...
Date: Tue, 23 Oct 2007 11:08:14 -0400
Subject: [WorthleyBotany] any other vine similar to Cynanchum laeve?

Hi -

Someone in Harpers Ferry has a vine growing on her property that she asked
me about. The leaves looked to me like those of Cynanchum laeve. I
didn't see any sign of flowers. What I'm wondering is whether anyone
knows of other opposite-leaved vines with a similar leaf that might be
another possibility ? The WV flora does say it's found along the
Shenandoah River in Jefferson County. (She's way up on the hill.)

There's an image of a piece of the vine at:

http://www.potomacaudubon.org/wbc/janetsvine.jpg

--Kathy

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