[MAIPC] Dioscorea bulbifera, Dioscorea alata, or something else (I hope)?

[Susan Gitlin]

Hi.  Here along the Maury River in Rockbridge County, VA, a friend of mine
pointed out a vine to me, indicating that she thought it could be air
potato.  I have been fortunate enough to never deal with air potato vines,
and am not familiar with it nor its ilk.  In examining it and noting the
purple area on the stem, I wonder if it is instead winged yam.  Neither
appears on the MAIPC invasive plant list (
https://www.invasive.org/maweeds.cfm), but I see that both plants are
invasive in regions south of here.  They would therefore be a fitting
addition to my Invasive Plant Arboretum, but I would really rather not have
yet another plant to remove.

Would you dear people please help me determine that this plant is not an
invasive but rather a native plant that I can leave alone?

Much obliged.

--Susan Gitlin
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.maipc.org/pipermail/maipc-maipc.org/attachments/20190729/7f4b670a/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: IMG_2853.JPG
Type: image/jpeg
Size: 2706087 bytes
Desc: not available
URL: <http://lists.maipc.org/pipermail/maipc-maipc.org/attachments/20190729/7f4b670a/attachment-0001.jpe>