Nigel Cattlin / Tulip (Tulipa sp) flower with orange petals, cross section showing mature anthers and style. Berkshire, England, UK. April.

Nigel Cattlin / Daffodil (Narcissus cyclamineus 'Jetfire') cross section of flower trumpet with stamens, style and ovules inside ovary. March.

Heather Angel / Scarlet monkey flower (Mimulus cardinalis). The high position of the stamens and stigma ensure that the heads of hummingbird pollinators make contact with them whilst nectaring. Cultivated in garden,...

Heather Angel / Mandrinette (Hibiscus fragilis), cultivated in breeding program at Kew Gardens, London, UK. Endemic to Mauritius.

Heather Angel / Bloody bellflower (Nesocodon mauritianus), female phase with red nectar surrounding stigma. Native to Mauritius. Cultivated at Kew Gardens, London, England, UK.

Heather Angel / Crown imperial lily (Fritillaria imperialis), six nectaries at base of stamens and stigma. In cultivation, Native to southeast Turkey and western Himalayas.

Heather Angel / Gold band lily (Lilium auratum) with yellow nectar guides. In cultivation. Native to Japan.

Heather Angel / Large-flowered evening primrose (Oenothera glazioviana). Bull's eye in centre of flower fluorescing in UV light guides pollinators to nectaries. At night in garden. Surrey, England, UK.

Heather Angel / Handkerchief / Dove tree (Davidia involucrata) inflorescence, stamens with green ovary and multi--rayed style beneath. Native to Sichuan ,northwest Yunnan, Guizhou and Hubei, China.

Phil Savoie / Giant harebell (Campanula latifolia), close up of opened style, Pentwyn farm SSSI, Gwent Wildlife Trust Reserve, Monmouthshire Wales UK, July.

Ernie Janes / Stile and footpath, Aldbury Nowers Nature Reserve, the Chilterns, Hertfordshire, UK, July 2016,

Gavin Hellier / Stylish modern architecture of the newly opened Terminal 3 of Dubai International Airport, Dubai, UAE, United Arab Emirates 2010