The flower heads take the form of axially arrayed panicles. They are 15 to 32 cm long and have two to three, or many flowers. The accompanying leaves are about 12.5 mm long, the flower stand axes are from 2.5 to 5 mm. The bell is 7.5 to 9 mm long and silky. The sepals are longer or of the same length as the shuttles. The crown is purplish or white. The flag is 1.5 mm long. The wings are 2.5 to 3.8 cm long.
In the fruit ripening stage, a 4 to 13 cm long, 1 to 2 cm wide, unwinged leguminous fruit develops. There is a ridge along the length of the fruit. The husk is very hairy and carries up to seven seeds. The seeds are flattened uniform ellipsoid, 1 to 1.9 cm long, 0.8 to 1.3 cm wide and 4 to 6.5 cm thick. The hilum, the base of the funiculus (connection between placenta and plant seeds) is a surrounded by a significant arillus (fleshy seeds shell).
Mucuna pruriens bears white, lavender, or purple flowers. Its seed pods are about 10 cm long and are covered in loose orange hairs that cause a severe itch if they come in contact with skin. The chemical compounds responsible for the itch are a protein, mucunain, and serotonin. The seeds are shiny black or brown drift seeds. It is found in tropical Africa, India and the Caribbean.
The dry weight of the seeds is 55 to 85 g/100 seeds.
The number of chromosomes in the plant cells is 2n = 20, 22 or 24.
In many parts of the world Mucuna pruriens is used as an important forage, fallow and green manure crop. Since the plant is in the legume family (peas and beans), it, with the help of nitrogen fixing bacteria, takes nitrogen gas from the air and combines it with other chemical compounds producing fertilizer and improving the soil.
Mucuna pruriens is a widespread fodder plant in the tropics. To that end, the whole plant is fed to animals as silage, dried hay or dried seeds. Mucuna pruriens silage contains 11-23% crude protein, 35-40% crude fiber, and the dried beans 20-35% crude protein..
Mucuna pruriens is sometimes used as a coffee substitute called "Nescafe" (not to be confused with the commercial brand). Cooked fresh shoots or beans can also be eaten. This requires that they be soaked from at least 30 minutes to 48 hours in advance of cooking, or the water changed up to several times during cooking, since otherwise the plant can be toxic to humans. The above described process leaches out chemical compounds such as levodopa, making the product suitable for consumption. If consumed as food, unprocessed Mucuna pruriens is toxic to nonruminant animals including humans.
In history, M. pruriens has been used as an aphrodisiac (hence the species name, pruriens, i.e., prurience/prurient). It is still used to increase libido in both men and women due to its dopamine inducing properties. Dopamine has a profound influence on sexual function. A typical dose for a man is 15 g of ground seeds mixed with cow's milk.
Mucuna pruriens seeds have also been found to have antidepressant properties when consumed.
Dried leaves of Mucuna pruriens are sometimes smoked.
Mucuna pruriens has also recently become popular among lucid dreaming enthusiasts: when combined with other supplements that stimulate the cholinergic system, the dopamine presumably produced from the consumption of Mucuna pruriens confers upon the lucid dreamer greater motivation and confidence.
The hairs lining the seed pods contain 5-hydroxytryptamine (serotonin) which causes severe itching (erythema). The hairs on the outside of the pods of Mucuna pruriens are a common ingredient in itching powder.
Mucuna pruriens is used in the countries of Benin and Vietnam as a biological control for problematic Imperata cylindrica grass. Mucuna pruriens is said not to be invasive outside its cultivated area.
In addition to levodopa, Mucuna also contains 5-HTP, nicotine, N,N-DMT, bufotenine, and 5-MeO-DMT. As such, it could potentially have psychedelic effects, and it has purportedly been used in ayahuasca preparations.
The mature seeds of the plant contain about 3.1-6.1% L-DOPA, also trace amounts of bufotenine, DMT, DMT-n-oxide, 5-MeO-DMT-n-oxide, beta-carboline, nicotine and 5-hydroxytryptamine. One study using 36 samples of the seeds found no tryptamines present in them.