Herbariuma Backpackers project
All plants

Narrow-leaved lupin

Lupinus angustifolius

Family · Fabaceae · Poisonous

Toxic

Read this before the sheet

This plant, or one that resembles it, is dangerous. Identifying is not authorising: no app has the authority to tell you that you may eat or touch a plant.

Narrow-leaved lupin (Lupinus angustifolius)Narrow-leaved lupin (Lupinus angustifolius)
Roger Culos, CC BY-SA 3.0 · Krzysztof Ziarnek, Kenraiz, CC BY-SA 4.0

The wild lupin with violet-blue flowers in a spike and leaves in a whorl like a fan of thin fingers. It bears seeds identical to the snack lupin's, and those are not eaten.

Where it grows

Fields and pasture · Roadsides and waste ground · Pine woods · Scrubland

Also known as

blue lupin, wild lupin

In flower

How to tell it

Palmate leaves with five to nine very narrow leaflets set in a whorl from one point, like the spokes of a wheel. A loose spike of violet-blue or lilac flowers. Hairy flat pods with three to seven smooth seeds mottled brown and white.

What it is confused with

White lupin

Lupinus albus

Confusion that poisons

The cultivated lupin has white or pale blue flowers and broad leaflets; the wild one has violet-blue flowers and very narrow leaflets. But even the cultivated one, picked in the field, may be a bitter variety: the lupin you eat comes soaked and salted, not out of the pod.

What it is for

None. The seeds contain quinolizidine alkaloids, chiefly lupanine, and are bitter and toxic: they cause dry mouth, blurred vision, fast heartbeat and confusion. The snack lupin is the same family but a sweet variety, and even that takes days of soaking in salted water. A lupin seed picked in the field is never eaten.

Sources