Asters, Asteraceae, Close-up view of flowers with yellow stamen growing outdoor.

Asters, Asteraceae, Close-up view of two purple flowers with yellow stamen.

Asters, Asteraceae, Close-up view of two purple flowers with yellow stamen.

Fred Howard Amacrinum, Crinodonna lily x Amarcrinum Fred Howard, Pink star shaped flowers growing outdoor.

Abelmosk, Abelmoschus moschatus, Single pink star shaped flower growing outdoor.

Abelmosk, Abelmoschus moschatus, Single pink star shaped flower growing outdoor.

Allium 'Gladiator', Close up detail of mass of pink star shaped flowers.

Christmas cactus, Schlumbergera x bridgesii, Close view of one bright pink flower with swept back petals, white stamens and unusual star shaped pink stigma.

Allium, Allium aflatunense 'Purple Sensation', Close view of one flowerhead just opening with many tiny star shaped flowers radiating out from the centre.

Allium, Allium aflatunense 'Purple Sensation', Close view of one flowerhead with many tiny star shaped flowers radiating out from the centre.

Tulip, Tulipa turkestanica, Close side view of a few white star shaped flowers with yellow centres, and showing stamens and stigmas.

Star anise, Illicium verum, A mass of star shaped husks holding the seeds.

Opium poppy, Papaver somniferum, seedhead on a single stem that has bent sideways, towards the left.

Opium poppy, Papaver somniferum, seedhead on a single stem that has bent sideways, towards the right.

Opium poppy, Papaver somniferum seedhead on a single stem that has bent sideways, towards the left.

Sea holly, known as Miss Wilmott's ghost, Eryngium giganteum, spikey silvery leaves in soft focus creating a wintery abstract pattern.

Sea holly, known as Miss Wilmott's ghost, Eryngium giganteum, single silvery flower showing central cone and spikey skirt or bract. A bee and other insects are feeding on the nectar.

Sea holly, known as Miss Wilmott's ghost, Eryngium giganteum, single silvery flower showing central cone and spikey skirt or bract.

Smoke bush, Cotinus coggygria 'Royal Purple', masses of tiny flowers with dark purple leaves behind and contrasted against golden foliage in soft focus.

Black poplar, Populus nigra. Studio shot of mottled brown autumn leaf lying on rough, yellow background.

Black poplar, Populus nigra. Studio shot of brown and splitting autumn leaf lying on rusty metal sheet.

Black poplar, Populus nigra. Close up of mottled brown and black autumn leaf lying on rough, yellow background.

Black poplar, Populus nigra. Studio shot of mottled brown and black autumn leaf lying on rough, yellow background.

Ivy, Hedera helix 'Glacier'. Shadow on cream wall of leaves and stems of Common ivy.