Mock orange, Philadelphus coronarius 'Aureus', close up of flowers and yellow coloured leaves.

Marguerite daisy, Argyranthemum frutescens 'Cornish gold', close up.

Marguerite daisy, Argyranthemum frutescens 'Cornish gold' ,close up.

Wallflower, Fragrant Star, Erysimum 'Fragrant Star', bright yellow flowers.

Viola, close up detail of the centre of a yellow coloured flower.

Viola, close up detail of the centre of a yellow coloured flower.

Daffodil 'Jack the Lad', Narcissus 'Jack the Lad', yellow flowers growing outdoors against a blue sky.

Daffodil 'Jack the Lad', Narcissus 'Jack the Lad', yellow flowers growing outdoors against a blue sky.

Bamboo, Yellow-groove bamboo, Phyllostachys aureosulcata, side view showing stem details.

Daffodil, Narcissus 'Dutch Master', straight on shot of a single flower against solid black background.

Daffodil, Narcissus 'Dutch Master', straight on shot of a single flower against solid black background.

Dahlia 'Bishop of Auckland', single red flower showing yellow stamen and dark purple leaves.