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From Middle Englishlupyne, lupine, from Old Frenchlupin, from Latinlupīnus(“pertaining to the wolf”), because of the wolf-like “fang” within the blossom. It has also been linked to an assumed depletion of nutrients in the soil.[1]
1991, R. F. Keeler, Handbook of Natural Toxins: Toxicology of Plant and Fungal Compounds, CRC Press, →ISBN, page 371:
Lupins had been introduced into German agriculture in 1841 and had rapidly become a popular and useful feed for sheep as well as being used as a green manure plant for increasing soil fertility in poor-quality, sandy soils.
A lupin bean, a yellow legume seed of a Lupinus plant (usually Lupinus luteus), used as feed for sheep and cattle and commonly eaten in the Mediterranean area and in Latin America although toxic if prepared improperly.
1998, Tam Garland, A. Catherine Barr, Toxic Plants and Other Natural Toxicants, CABI, →ISBN, page 143:
Lupins contain less than 3% starch (Evans, 1994), the main fermentable carbohydrate involved in rumen acidosis when cereal grains are fed to ruminants. For this reason lupins have generally been regarded as a completely safe feed for sheep and cattle, and required no gradual introduction (Rowe, 1995).
2010, Ken Albala, Rosanna Nafziger Henderson, The Lost Art of Real Cooking: Rediscovering the Pleasures of Traditional Food One Recipe at a Time, Penguin, →ISBN:
Lupins, although a bean, are similar to olives aesthetically, and are equally good with breakfast. The trick is first to soak them overnight until rehydrated, then boil them for a few hours like any bean. They will not soften. Then soak them again, changing the water every day for several weeks until the bitterness is gone.
^ Tony Winch (2007) Growing Food: A Guide to Food Production, Springer Science & Business Media, →ISBN, page 278: “The name “lupin” comes from the Latin word for wolf, in the mistaken belief that the plants depleted or “wolfed” nutrients from the soil.”