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In most species, each flower consists of five petal-like sepals which grow together to form a hollow pocket with a spur at the end, which gives the plant its name, usually more or less dark blue. Within the sepals are four true petals , small, inconspicuous, and commonly coloured similarly to the sepals.
Growing to 120 cm (47 in) tall by 30 cm (12 in) wide, it is a woody-based erect herbaceous perennial, with oval leaves and dense cushions of violet-purple flowers in summer. [3] The specific epithet caeruleum means "dark blue". [4] In temperate climates this plant is usually grown as a half-hardy annual for summer bedding schemes or planters.
Jacaranda mimosifolia is a sub-tropical tree native to south-central South America that has been widely planted elsewhere because of its attractive and long-lasting violet-colored flowers. It is also known as the jacaranda, blue jacaranda, black poui, Nupur or fern tree.
In summer, red buds open to reveal small, bright cobalt blue flowers with five petals and five white scales protecting the stigma and anthers. [5] In the US, it grows well in zones 8–11. [6] Cultivars include 'Dawn', with white, pink, mauve and blue flowers, 'Blue Angel', with dark blue flowers, and 'Blue Bird', taller and with indigo blue ...
The flowers appear in the spring and form a spike or raceme, being held in a close or loose spiral around a central stalk. The flowers often become less tightly spaced as the flower matures. The flower colour varies from pale blue to a very dark blue, almost black in some cases (albino forms are also known).
Navy blue is a shade of the standard (h = 240°) blue. Navy blue got its name from the dark blue (contrasted with white) worn by sailors in the Royal Navy since 1748 (originally called marine blue before 1840) and subsequently adopted by other navies around the world. The first recorded use of navy blue as a color name in English was in 1840. [24]
Plumbago auriculata with white flowers. Plumbago auriculata, the Cape leadwort, [2] blue plumbago or Cape plumbago, is a species of flowering plant in the family Plumbaginaceae, native to South Africa and Mozambique. [3] [4] The specific epithet auriculata means "with ears", referring to the shape of the leaves. [5],leaf venation - reticulate
A medium to dark semi-saturated blue-purple is the typical flower color for Aconitum species. Aconitum species tend to be variable enough in form and color in the wild to cause debate and confusion among experts when it comes to species classification boundaries.