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Bituminaria bituminosa

Trèfle bitumineux
Pitch Trefoil

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Additional information

Plant family

Area

Provence Verte

Flower colour

purple

Flower size

15-20 mm

Flowering months

March,

April,

May,

June,

July,

August

Leaf type

Trifoliate

Height

30-100 cm

Description

The name of this plant has changed to Bituminaria bituminosa, but is still commonly known as Psoralea bituminosa. The plant strongly smells of tar.

Flowers

Pale purple flowers are borne in lateral long-stalked heads.

Leaves

Trifoliate with three leaflets. 3 leaflets, elliptical, on a longish stalk, 1-6 cm long, covered in translucent dots (oil glands).

Fruits Seeds

Pod: pointed, curved towards end, 1.5 cm long.

Medical

Leaves and flowers: a substance called ‘psoralen’, present in Pitch Trefoil is used in the treatment of psoriasis, vitiligo and other skin conditions.

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