Impatiens x pacifica
Bruce N. Newhouse

Flora of Oregon

Plants to 2.2 m.

Leaves alternate; blades ovate to elliptic, crenate to dentate, tips acute to blunt; petiole bases eglandular.

inflorescences 1–4-flowered; peduncles 1–3 cm.

Flowers primarily yellow-orange, uniform on an individual but expressed as 2 separate forms in a population; spotted spurless forms, sac-like, with irregular and coarse, usually dark orange markings within tube or at mouth; spotless spurred forms abruptly tapered to strongly curved spur, without dark markings within tube or at mouth; distance between pedicel and base of spur 14–18 mm; pollen with reduced fertility.

Fruits narrowly oblong to narrowly oblanceolate, 12–20 mm.

Seeds oblong to narrowly ovate or narrowly elliptic, longitudinally ridged on corners, faces ± smooth.

Shores, marshes, freshwater intertidal, damp ground, floodplains. Flowering Aug–Oct. 0–50 m. CR, Est. WA. Native.

Impatiens × pacifica is a hybrid always found mixed among its parents, exotic I. capensis and native I. ecornuta, and combining their floral characters in one of two ways. Hybrid plants bear only one sort of flower: either the spotted, spurless floral form or the spotless, spurred floral form. Both forms are usually common in a population. The spotless, spurred floral form closely resembles the spotless color form of I. capensis, which is invariably spurred, rare in Oregon, and, so far, does not occur in mixed populations that include spurless plants.

Photo images

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Herbarium specimens

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