Marigold, Calendula officinalis. Close front view of one open orange flower with leaves behind. Selective focus.

Amaryllis, Hippeastrum 'Gervase', One stem with striped flowers, deep magenta petals and white highlights, Long curled stamen and stigma, Against a graduated white background.

Amaryllis, Hippeastrum 'Gervase', Close view of one stem with bold, striped flowers, deep magenta petals and white highlights, Long curled stamen and stigma, Against a white background.

Amaryllis, Hippeastrum 'Gervase', Close view of one stem with bold, striped flowers, deep magenta petals and white highlights, Long curled stamen and stigma, Against a white background.

Amaryllis, Hippeastrum 'Gervase', One stem with bold, striped flowers, deep magenta petals and white highlights, Long curled stamen and stigma, Against a graduated white background.

Amaryllis, Hippeastrum 'Gervase', One stem with bold, striped flowers, deep magenta petals and white highlights, Long curled stamen and stigma, Against a graduated white background.

Heliconia rostrata, often known as Lobster claw, Close view of the bright red pendula clawlike flowers tipped with yellow and green, Photographed in Southern Vietnam.

Heliconia rostrata, often known as Lobster claw, Close view of the bright red clawlike flowers tipped with yellow and green, Photographed in Southern Vietnam.

Heliconia rostrata, often known as Lobster claw, Close view of the bright red clawlike flowers tipped with yellow and green, Photographed in Southern Vietnam.

Heliconia rostrata, often known as Lobster claw, Detail of the bright red petals tipped with yellow and green, Overlapping to create a pattern.

Heliconia rostrata, often known as Lobster claw, Bright red pendula clawlike flowers tipped with yellow and green, surrounded by glossy green leaves, Photographed in Southern Vietnam.

Trailing ice plant, Delosperma cooperi, Side few of a few open vivid pink flowers with unusual central stamens.