Jean E. Roche / Vegetable marrows, Cidamos Garden, Alpilles, France, October.

Konrad Wothe / Gliding seed of Climbing Gourd (Alsomitra macrocarpa) in tropical rainforest, West Papua, New Guinea, Indonesia, digital composite

Nigel Cattlin / Ivy gourd (Coccinia grandis). Koh Kret, Nonthaburi Province, Thailand.

Heather Angel / Butterflies and day flying moths feed from Loofah flower (Luffa cylindrica) and pick up pollen on their legs, underside of thorax and antennae, South Sichuan Bamboo Sea, China

Heather Angel / Stigmas in female flowers of single Wax begonia (Begonia semperflorens group) mimic pollen laden stamens produced by male flowers but offer no reward to pollinators, which land on them and pollinate t...

Tim Laman / Wild Begonia, Batang Toru Forest, Sumatran Orangutan Conservation Project, Northern Sumatran Province, Indonesia.

Heather Angel / Honey bee (Apis mellifera) with pollen grains on back. Inside male Squash (Cucurbita sp) flower. Cultivated in garden, Surrey, England, UK. September.

Felis Images / Begonia (Begonia xanthina) flowers, West Bengal, India.

Sylvain Cordier / Cucumber tree (Dendrosicyos socotrana) Socotra Island UNESCO World Heritage Site, Yemen.

Nick Upton / Squirting cucumber (Ecballium elaterium) flowering in roadside scrubland bordering a coastal lagoon, with some fruits developing, near Nafplio, Argolis, Peloponnese, Greece, July.

Nick Upton / Squirting cucumber (Ecballium elaterium) flowering in roadside scrubland bordering a coastal lagoon, with some fruits developing, near Nafplio, Argolis, Peloponnese, Greece, July.

Chris Mattison / Pumpkin flower bud (Cucurbita cultivar), Catbrook, Monmouthshire, Wales, UK. Focus-stacked image.