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Substance D, a fictitious drug in Philip K. Dick's 1977 novel A Scanner Darkly, is derived from a plant with blue flower. Tennessee Williams used images of blue roses in his play The Glass Menagerie to symbolize the frailty and uniqueness of Laura, a central character that reflects the life of Williams' sister, who underwent a lobotomy. In the ...
Blue lily may refer to the following plant species: Agapanthus praecox, native to South Africa and widely cultivated; Nymphaea caerulea (Blue Egyptian water lily or sacred blue lily), native to East Africa and widely cultivated; Nymphaea violacea, a species of waterlily native to northern Australia; Stypandra glauca (nodding blue lily), native ...
Symphyotrichum cordifolium (formerly Aster cordifolius), commonly known as common blue wood aster, heartleaf aster, [3] and blue wood-aster, [4] is a perennial herbaceous flowering plant in the family Asteraceae native to central and eastern North America. It reaches heights of up to 1.2 meters (4 feet) and has bluish daisy-like flowers which ...
Example of this kind of pigment is present in hydrangea sepals. Main anthocyanin here is delphinidin-3-glucoside what should result in the blue flower formation, but cultivars with red and pink flowers are also present. It is known that acidification of soil can cause change of the hydrangea flower colour from red/pink to blue/violet.