Lotus tetragonolobus and Psophocarpus tetragonolobus

[Elaine Chittenden]

Can anyone recommend a reference or 2 that would illustrate or describe the
difference between these 2 taxa?  Both of these go by the common name asparagus
pea, winged pea or winged bean.  We may end up growing both (instead of just
one currently) for education and display in a portion of the economic
section of Beal Garden and I need to know the difference for  interpretive
labeling.

The general references I have do not describe a clear morphological
distinction between the two, mentioning different origins only. I could use
a good reference on economically important legumes, their cultivars etc, if
anyone knows of one I sure would appreciate hearing about it.

Elaine Chittenden
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Elaine Chittenden        Email:chitt at gnds.msu.edu
Collections Manager, W. J. Beal Botanical Garden
Grounds Maintenance, Michigan State University