Lathyrus angulatus L.

Annual, Herbs, Taproot present, Nodules present, Stems erect or ascending, Stems less than 1 m tall, Climbing by tendrils, Stems solid, Stems or young twigs glabrous or sparsely glabrate, Stems winged or with decurrent stipules, Leaves alternate, Leaves petiolate, Stipules conspicuous, Stipules green, triangulate to lanceolate or foliaceous, Stipules persistent, Stipules free, Leaves compound, Leaves even pinnate, Leaf or leaflet margins entire, Leaflets opposite, Leaflets 2, Leaves glabrous or nearly so, Flowers in axillary clusters or few-floweredracemes, 2-6 flowers, Inflorescence axillary, Bracts very small, absent or caducous, Flowers zygomorphic, Calyx 5-lobed, Calyx glabrous, Petals separate, Corolla papilionaceous, Petals clawed, Petals blue, lavander to purple, or violet, Banner petal o void or obovate, Wing petals narrow, oblanceolate to oblong, Wing petals auriculate, Wing tips obtuse or rounded, Keel tips obtuse or rounded, not beaked, Stamens 9-10, Stamens diadelphous, 9 united, 1 free, Filaments glabrous, Style flattened, Style hairy, Style hairy on one side only, Style persistent in fruit, Fruit a legume, Fruit unilocular, Fruit freely dehiscent, Fruit elongate, straight, Fruit rugose wrinkled or reticulate, Fruit exserted from calyx, Valves twisting or coiling after dehiscence, Fruit glabrous or glabrate, Fruit 3-10 seeded, Seeds ovoid to rounded in outline, Seed surface smooth, Seeds olive, brown, or black.

Lathyrus angulatus is a species of wild pea known by the common name angled pea.

It is native to southern Europe and North Africa, and it is known from elsewhere as an introduced species.

This is an annual herb with a flanged, hairless stem. Each leaf is made up of two leaflike leaflets each a few centimeters long and very narrow. It has tiny coiling tendrils. The inflorescence holds a solitary flower on a long bristle-tipped peduncle with the flower situated midway. The purple pea flower is about a centimeter wide. The fruit is a hairless dehiscent legume pod.