Fauna
Plant

Hyacinth Bean

Lablab purpureus

Also known as Lablab Bean, Bonavist Bean, Egyptian Kidney Bean, Indian Bean

Hyacinth bean is a vigorous, climbing legume renowned for its dramatic purple-tinted foliage, fragrant pinkish-purple blossoms, and vivid magenta seed pods. Deep taproots allow it to thrive in drought-prone tropical soils while fixing atmospheric nitrogen that enriches depleted ground. Widely cultivated across Africa and Asia for thousands of years as forage and traditional food, it often escapes gardens to scramble over fences and forest margins.

ClimbingNitrogen-fixingFlowering
Hyacinth Bean reference1 / 7
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Least ConcernConservation statusIUCN Red List categoriesLCNTVUENCREWEXLeast ConcernRed List categories, explained →
Key facts
Diet & preyAutotrophic (photosynthetic)
Predators
  • Bean pod borer
  • Aphids
  • Root-knot nematode
ThreatsHabitat loss in native range; frost intolerance in temperate zones
HabitatsTropical grasslands, open woodlands, disturbed soils, and agricultural margins
Life span1–3 years (annual in temperate zones, short-lived perennial in tropics)
Classification
  1. OrderFabales
  2. FamilyFabaceae
  3. GenusLablab
  4. SpeciesLablab purpureus
Range & activity
Range data is not available yet.
Safe observation
Interaction riskHigh
  1. Low
  2. Moderate
  3. High
  4. Very high
Why interaction risk is high
Raw seeds contain toxic cyanogenic glycosides; do not ingest without thorough boiling.
Why it is dangerous
Mature raw seeds contain cyanogenic glycosides that release toxic hydrogen cyanide when chewed, causing vomiting, dizziness, and respiratory distress.
How to recognize a risky encounter
Recognize by twining purplish stems, trifoliate leaves, and flat, glossy, reddish-purple seed pods with white-rimmed seeds.
What to do
Never consume raw pods or dry beans; observe flowers and foliage safely without ingesting any plant parts.
Responsible observation
  • Garden Trellising: Provide a sturdy arbor or fence early, as mature vines carry substantial weight.
  • Pollinator Watching: Look for large carpenter bees and butterflies visiting the nectar-rich flowers in sunny weather.
Related species
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