Pal Hermansen / Meadow vetchling (Lathyrus pratensis) and brambles (Rubus) growing on the dashboard of the abandoned car in 'car graveyard' Bastnas, Sweden, July

Andy Sands / Clouded yellow butterfly (Colias crocea) On Wild sweet pea flower, Captive, UK, July

Michael Durham / Bumblebee (Bombus morrisoni) queen, flying toward Sweet Pea flowers in the Deschutes National Forest, Oregon

Nigel Cattlin / Manila tamarind (Pithecellobium dulce) seedpods for sale at food market, Bangkok, Thailand.

Ashley Cooper / Peas in a pod.

Matthew Maran / Calcareaous grassland including Southern marsh-orchid (Dactylorhiza praetermissa) Grass vetchling (Lathyrus nissolia) Cowslip (Primula veris) Creeping buttercup (Ranunculus repens) East Devon, Englan...

Rod Williams / Brimstone butterfly (Gonepteryx rhamni) male feeding on Everlasting sweet pea (Lathyrus latifolius) Brockley Cemetery, Lewisham, London, England, UK. July.

Rod Williams / Brimstone (Gonepteryx rhamni) male feeding on Everlasting sweet pea (Lathyrus latifolius) Brockley Cemetery, Lewisham, London, England, UK. July.

Nick Upton / Sweet acacia / Needle bush (Vachellia farnesiana / Acacia farnesiana) a Central American species invasive in many parts of the world on dry saline soils, growing by the coast, near Nafplio, Argolis, P...

Nick Upton / Tangier pea (Lathyrus tingitanus), a native species, flowering in one of the island's few surviving patches of laurel forest, Los Tilos de Moya, Doramas Rural Park, Gran Canaria UNESCO Biosphere Reser...

Nick Upton / Tangier pea (Lathyrus tingitanus), a native species, flowering in one of the island's few surviving patches of laurel forest, Los Tilos de Moya, Doramas Rural Park, Gran Canaria UNESCO Biosphere Reser...

Nick Upton / Grass vetchling (Lathryrus nissolia) flowering in a coastal grassland meadow, RSPB Dungeness Nature Reserve, Kent, UK, May.