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A blue flower (German: Blaue Blume) was a central symbol of inspiration for the Romanticism movement, and remains an enduring motif in Western art today. [1] It stands for desire , love , and the metaphysical striving for the infinite and unreachable.
Blue flowers are rare in nature, [citation needed] and despite many attempts, blue roses, carnations and chrysanthemums in particular cannot not be produced by conventional breeding techniques. Blue colour in flower petals is caused by delphinidin, a type of anthocyanin, which are a class of flavonoids. [1]
Each flower is 14–20 mm (0.55–0.79 in) long, with two bracts at the base, and the six tepals are strongly recurved at their tips. [8] The tepals are violet–blue. [12] The three stamens in the outer whorl are fused to the perianth for more than 75% of their length, and bear cream-coloured pollen. [8] The flowers are strongly and sweetly ...
The flower heads are 3–5 cm (1 + 1 ⁄ 4 –2 in) wide, [5] and usually light blue [6] or lavender; it has also rarely been described as white or pink. [5] Of the two rows of involucral bracts, the inner is longer and erect, the outer is shorter and spreading. It flowers from March until October. [6] The seed has small scales at the tip. [6]
Flower forms are variable, with one head per stem; these can be as small as 5 cm (2 in) in diameter or up to 30 cm (1 ft) ("dinner plate"). The majority of species do not produce scented flowers. Like most plants that do not attract pollinating insects through scent, they are brightly colored, displaying most hues, with the exception of blue.
Neutral blue (rather than purplish or greenish), greenish-blue, and intense blues, available in some related Delphinium plants—particularly Delphinium grandiflorum—do not occur in this genus. Aconitum plants that have purplish-blue flowers are often inaccurately referred to as having blue flowers, even though the purple tone dominates. If ...