Philadelphus lewisii Pursh

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Philadelphus lewisii, the Lewis' mock-orange, mock-orange, Gordon's mockorange, wild mockorange, Indian arrowwood, or syringa, is a deciduous shrub native to western North America, and is the state flower of Idaho.

It was first collected for science by scientist and explorer Meriwether Lewis in 1806 during the Lewis and Clark Expedition, and so was named after him.

 

The perennial shrub is rounded and grows to 1.5–3 meters (4 ft 11 in – 9 ft 10 in) in height. It sends out long stems which are red when new and fade to gray with age, the bark shredding in small flakes.

The oppositely arranged leaves vary in size across individual plants but they are usually oval, 3–5 centimeters (1+1⁄4–2 in) long, smooth or serrated along the edges, and light green in color with a rough texture.

The flowers are produced in clusters at the ends of long stems, with four white petals up to 4 cm (1+1⁄2 in) long and numerous yellow stamens. At the height of flowering, the plant is covered in a mass of blossoms. The flowers have a heavy, sweet scent similar to orange blossoms with a hint of pineapple.

The fruit is a small hard capsule about 1 cm long with woody, pointed wings, containing many brown seeds. Drought will stunt fruit development and prevent the production of viable seeds.

The plant is somewhat similar in appearance to serviceberry.

Philadelphus lewisii - Wikipedia

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