Skip to content

Seed of the Week: Phaseolus sp.

Our oddly bumpy mystery seeds from last week were from a vine in the bean genus Phaseolus.

Here in the Southwest, there are a number of native vines in the genus Phaseolus that are related to the tepary bean, Phaseolus acutifolius var. tenuifolius.

phaseolus-flower

They all have lovely pink flowers that look alike.

phaseolus-leaves

They all have trifoliate leaves that can be lobed during part of the season,

phaseolus-leaves-101

or look more smoothly rounded.

phaseolus-leaf-close

This particular plant had a pair of small spines behind the center leaflet.

phaseolus-bean

As with their other beany relatives, the seeds are produced in small pods.

It appears that the taxonomy of this group is still being worked out.

Phaseolus-seeds-156

The seeds resemble the drawings of tepary beans found at wildflower.org.

Other possibilities include the Sonoran bean, Phaseolus pedicellatus.

So, it appears that the plant that we found growing in our yard is still a bit of a mystery.

Do you know what species of Phaseolus this is?

Note:  The common green bean, Phaseolus vulgaris, is also native to the U.S.

Leave a Reply

Your email address will not be published. Required fields are marked *