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Red Hamburger Bean
Mucuna urens


The Red Hamburger Bean, about 1 inch (25 mm) in diameter.
Photo: Gina Reed

The characteristics of any genus, including the genus Mucuna, is exemplified by one single species that is designated to do so. This "characteristic" species, designated to depict what other species should be included in the genus, is called the "type species". In the case of Mucuna, the "type species" is: urens! Thus, the characteristics of Mucuna urens should be used to answer the question "What is a Mucuna"? In botany, the reproductive structures... the flowers!... are often given a higher "weighting" of importance (versus seeds, leaves, etc.) in determining what other genera and species are similar or not. Gina's flowers (shown below) of Mucuna urens, because it is a type species, are "mission critical" to use to (help?) determine what "Mucuna sensu stricto"really is! Photographic documentation of Mucuna urens, their flowers, their structure, the resultant pods and seeds are critical to furthering our knowledge and characteristics of the genus Mucuna and all other species of Mucuna. The flowers are also important to distinguish Mucuna from other related genera (e.g., Dolichos, Dioclea, Strongylodon, Gigasiphon, etc.).

The young plant of Mucuna urens, grown from the seed shown above.
Photos: Gina Reed

 
After 5 years of only stem and leaf growth, a short "raceme" of young flowers of Mucuna urens appeared.
Note the zig-zag, alternating stalk (compare to the flower "cluster" of Mucuna sloanei)
Photos: Gina Reed

 
Immature flowers of Mucuna urens
(Click on either of these two images, above, to view larger images!)
Photos: Gina Reed



 
Mature, opened flowers of Mucuna urens.
Typical of Mucuna spp., there are 9 fused stamens + 1 individual, isolated stamen.
Photos: Gina Reed



Photo: Gina Reed

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Some photos of M. urens and unidentified sea-beans that may be (or may not be!) M. urens
are on the "Sea-beans by Location" page for Windermere Island, Bahamas.


Links

Images of Leaves, flowers and a pod (on Cybertruffle.com) Images labelled Dolichos urens (an old/original generic placement) "Wayne's Word" page including many sea-beans - by Wayne Armstrong Definition of Mucuna - Wikipedia A descriptive narrative - Division of Plant Industry (Florida, USA) Flower and pod images - also with data on localities, common names, synonyms, and citations. Images of flowers, pods, and seeds (scroll way to bottom of page) Images of young raceme of flowers and a triplet of leaves Images of immature and mature (opened) flowers and a triplet of leaves