Canavalia ensiformis
Overview
 
Canavalia ensiformis, or (Common) Jack-bean, is a legume which is used for animal fodder
Fodder
Fodder or animal feed is any agricultural foodstuff used specifically to feed domesticated livestock such as cattle, goats, sheep, horses, chickens and pigs. Most animal feed is from plants but some is of animal origin...

 and human nutrition, especially in Brazil
Brazil
Brazil , officially the Federative Republic of Brazil , is the largest country in South America. It is the world's fifth largest country, both by geographical area and by population with over 192 million people...

 where it is called feijão-de-porco ("pig bean"). It is also the source of concanavalin A
Concanavalin A
Concanavalin A is a lectin originally extracted from the jack-bean, Canavalia ensiformis. It binds specifically to certain structures found in various sugars, glycoproteins, and glycolipids, mainly internal and nonreducing terminal α-D-mannosyl and α-D-glucosyl groups...

.
C. ensiformis is a twining plant up to 1 metres (3.3 ft) in height. It has deep roots, which makes it drought resistant.
 
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