Tetragonolobus purpureus, synonym Lotus tetragonolobus, known as asparagus-pea or winged pea, is an annual leguminous herb native to the countries around the Mediterranean, although introduced elsewhere. It is low growing, and produces a profusion of prominent deep red flowers, followed by seed pods that are longitudinally winged.
It is cultivated for its edible green seed pods, which are one of the vegetables known as asparagus pea or winged pea.
- "Tetragonolobus purpureus Moench". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2018-02-06.
- "BSBI List 2007". Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-01-25. Retrieved 2014-10-17.
- "Tetragonolobus purpureus". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 9 December 2015.
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