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Like all morning glories, the plant entwines itself around structures, growing to a height of 2–3 m (6 ft 7 in – 9 ft 10 in) tall. The leaves are heart-shaped and the stems are covered with brown hairs. The flowers are trumpet-shaped, predominantly blue to purple or white, and 3–6 cm (1.2–2.4 in) in diameter. [5]
The plants have tall spikes of purple flowers resembling bottle brushes or feathers that grow 1–5 ft (0.30–1.52 m) tall. The species grows in hardiness zones 3 - 8, [ 4 ] stretching from the Midwest to the East Coast, eastern and western Canada.
Growing to 3–6 m (10–20 ft) tall by 2–3 m (7–10 ft) wide, it is a sprawling evergreen shrub with longitudinally veined, dark green hairy leaves. Clusters of brilliant purple flowers up to 10 cm (4 in) in diameter, with black stamens, are borne throughout summer and autumn.
It grows to 15 to 30 inches tall, but most professional landscape contractors shear it lightly one time in late spring to keep it at the shorter end of those heights and more compact.
Ajuga reptans is a dense spreading groundcover with dark green leaves with purple highlights. The leaves grow 5–8 cm (2.0–3.1 in) tall. In spring the plant sends up 10–15 cm (3.9–5.9 in) tall flower stalks bearing many purple flowers. The flowers are frequently visited by flies, such as Rhingia campestris. [1]
Amberboa moschata is a branching herb up to 50 cm tall. Flower heads are usually purple, showy, and sweet-scented. Flower heads are usually purple, showy, and sweet-scented. [ 3 ] [ 6 ]
Glandora diffusa, the purple gromwell, syn. Lithodora diffusa, Lithospermum diffusa, is a species of flowering plant in the family Boraginaceae. It is a mat-forming perennial growing to 15 cm (6 in) tall by 60 cm (24 in) or more wide, with dark green, hairy evergreen leaves and masses of blue or white 5-lobed flowers.
Dalea purpurea is a species of flowering plant in the legume family known as purple prairie clover. [5] Native to central North America, purple prairie clover is a relatively common member of the Great Plains and prairie ecosystems. It blooms in the summer with dense spikes of bright purple flowers that attract many species of insects.