Today, florists sell roses in a range of colours including red, purple, yellow — and even painted with blue or multi-coloured dyes. But what colour were the first roses? A large genomic analysis ...

Blue roses have a mythic quality because they, until recently, were impossible to grow. Roses appear naturally in many shades of red, pink, yellow and white, but lack the natural ability to ...

Having been cultivated for more than 5,000 years, as many as 25,000 different species of roses currently exist, although colours are traditionally limited to red, pink, yellow and white.

Chyrsanthemums come in an array of colours, including pink, yellow and red. ... Alien plants may come in all colours but blue 2007-Apr-11. Blue as a rose 2000-Oct-05. Rights and permissions.