Denise Ramsay is a botanical artist originally from New Zealand, who now divides her time between Hong Kong and a cottage in the southwest region of France.
Ramsay paints keenly observed and intricately realized watercolors of flowers and other plants, sometimes at a fairly large scale, in watercolor.
Her paintings are bold and dynamic, apparently without compromising botanical accuracy. In one of her projects, she painted a poppy from bud (images above, third down) to full flower (top, with detail) to eventual faded bloom. There is an article on Bored Panda that follows the sequence.