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

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

Nigel Cattlin / Broad bean (Vicia faba) young plant with early leaves and roots, uprooted and germinated seed split to show food reserve.

Nigel Cattlin / Broad bean (Vicia faba), close up of roots and cross section of germinated seed to show food reserve.

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.

Nigel Cattlin / Doyenne du Comice pear (Pyrus communis) fruit with deformity and internal hard growth caused by Pear stony pit virus, cross section. Berkshire, England, UK. October.

Nigel Cattlin / Doyenne du Comice pear (Pyrus communis) fruit with deformity and internal hard growth caused by Pear stony pit virus, cross section. Berkshire, England, UK. October.

Nigel Cattlin / Jackfruit (Artocarpus heterophyllus), sections pf young fruit for sale at wet food market, Bangkok, Thailand.

Adrian Davies / Pitcher plant (Sarracenia minor) cross section of mature plant, insect prey inside.

Adrian Davies / Pitcher plant (Sarracenia minor) cross section of mature plant, insect prey inside.