Orchid, Orchidaceae, Close up of blue dyed flowers.

Orchid, Orchid Dendrobium, Close-up detail of mauve coloured flowers.

Spider lily, Crinum asiaticum Amaryllidaceae. White flower with narrow, re-curved petals at the 2009 Flower Festival in Chiang Mai, Thailand.

Orchid, Cockleshell orchid with dark purple striped labellum forming a hood with shell-like appearance at the 2011 Orchid Festival in Chiang Mai, Thailand.

Orchid, Spider orchid Paphiopedilum Harold Koopowitz at the 2011 Orchid Festival in Chiang Mai, Thailand.

Slipper orchid with pattern of purple, cream and white extending over petals and lip at the 2011 Orchid Festival in Chiang Mai, Thailand.

Orchid, Lady Slipper orchid with mottled brown, cream and white petals and lip at the 2011 Orchid Festival in Chiang Mai, Thailand.

Orchid. Vanda coerulea cultivar hybrid at the 2011 Orchid Festival in Chiang Mai, Thailand. Cluster of flowers with purple spotted petals.

Orchid, Spider orchid with orange petals spotted with brown at the 2011 Orchid Festival in Chiang Mai, Thailand.

Orchid, Blue vanda with pale blue petals marked with checkerboard pattern at the 2011 Orchid Festival in Chiang Mai, Thailand.

Orchid, Blue vanda with pale blue petals marked with checkerboard pattern at the 2011 Orchid Festival in Chiang Mai, Thailand.

Orchid, Blue vanda with pale blue petals marked with checkerboard pattern at the 2011 Orchid Festival in Chiang Mai, Thailand.