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A diagnostic(?) character sometimes used to distinguish one species of Mucuna from another is the length of the peduncle. However, it has been reported (Marco Acuna, pers. comm., Nov. 2015, in Costa Rica) that plants producing pods at higher elevations may produce longer peduncles than those plants producing pods at low elevations.
The peduncle is the stem-like portion of the vine that hangs down from the main stem and supports the flower and pod cluster.
The peduncles of this species are extremely long!!! Estimated peduncle lengths range from 3 to 5 feet. These are quite unlike the rather short peduncles of Mucuna sloanei, which are typically less than 1 foot in length.
Note: there is a possibility that what is being interpreted as long peduncles MAY simply be part of the vine, with short pedulcles off of that... but I don't think so. IF so, the vine would continue both TO and FROM the pods. Several pods or pod clusters show a single element TO the pods only... i.e., very long peduncles!
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