|Photo 1. General image of Spiraea douglasii
Spiraea douglasii, commonly known as Hardhack, is a provincially yellow listed shrub in BC. Federally it is not listed. It is part of the rose family. They are commonly found in riparian, stream, bog, fen, marsh, swamp, vernal pools, seeps, mixed forest or deciduous forest habitats.
Spiraea douglasii is a shrub that is 0.5-2.5 m tall. The leaves are thin. The leaf shape is ovate (oval, egg-shaped, with a tapering point and the widest portion near the petiole), oblong (having an elongated form with slightly parallel sides, roughly rectangular) or mucronate (ending abruptly in a small sharp point as a continuation of the midrib). Their surface is smooth or hairy. Their edges are dentate. Leaves are arranged alternate. Leaves are 3-10 cm long. The stems form is creeping and erect. It has a smooth surface. The flowers have 5 pink pedals or sepals. Flowers are about 2 mm long. Fruit are approximately smooth except sometimes a few long hairs along the suture The fruit are smooth. It has a rhizome root structure.
Their prefered habitat is riparian, stream, bog, fen, marsh, swamp, vernal pools, seeps, mixed forest or deciduous forest. Sun exposure is typically full sun, full sun, shade or shade. They typically grow in loamy, gravel or organic soil. Moisture requirements are freshwater seasonal, freshwater seasonal, saturated soil, saturated soil, saturated soil, moist soil, freshwater permanent, freshwater obligate or moist soil. And the pH requirements are neutral, slightly acidic, moderately acidic, or very acidic. It can be found from 0 m to 500 m in elevation. It can be found in British Columbia, Canada. Spiraea douglasii is found in the coastal-western-hemlock biogeoclimatic zone(s).