Nigel Cattlin / White pasqueflower (Pulsatilla vulgaris 'Alba') cross section, close up of stamens and stigma, cultivated in garden. Berkshire, England, UK. April.

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

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

Heather Angel / Himalayan balsam (Impatiens glandulifera), dissection of flowers. Male phase above, downward projecting stamens release pollen onto backs of bumblebees and honey bees. Female phase below with downward...

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.

Nigel Cattlin / Hoverfly (Episyrphus balteatus) feeding from the red flower of a long-headed poppy, (Papaver dubium), Berkshire, July

Nature Production / Morning glory {Ipomoea nil} cross section of seeds growing in ovary, Japan

Nature Production / Morning glory {Ipomoea nil} seeds growing in ovary, Japan

Nigel Cattlin / Lenten rose (Helleborus hybridus) red flower of an ornamental garden plant showing typical structure of flowering Ranunculaceae, Berkshire, UK, February.

Nigel Cattlin / A Ranunculaceae (Helleborus spp.) flower section showing stucture; anthers, stamens, styles, stigmae, nectaries

Nigel Cattlin / Side view section of a daffodil flower, Narcissus 'Jetfire', with yellow sepals and orange corona, ovary, pistil, stigma, filaments and anthers.

Nigel Cattlin / Close up of Oriental poppy flower (Papaver orientalis), dark anthers, stamens, filaments, ovary, stigma against red petals , Devon, England, UK. June.

Nigel Cattlin / Section through a flower of a Japanese quince (Chaenomeles japonica) showing anthers, style, stigma and petals

Nigel Cattlin / Close up of strawberry plant in flower

Nigel Cattlin / A section of a Tulip (Tulipa) flower showing its structure, red orange sepals, anthers, stamens, style, stigma and ovary

Nigel Cattlin / Red opium poppy (Papaver somniferum) in garden, Berkshire, England, UK, June.

Nigel Cattlin / Red opium poppies (Papaver somniferum) in garden, Berkshire, England, UK, June.

Nigel Cattlin / Yellow meadow buttercup (Ranunculus acris) against a black background