Birchleaf Spiraea, Shinyleaf Spiraea, Shiny-leaf Spirae, White Spiraeaa: Spiraea lucida (Synonyms: Spiraea betulifolia ssp. lucida, Spiraea betulifolia var. lucida) - An erect or ascending shrub to 1 meter high. Leaves egg shaped or elliptical, often toothed midleaf to the tip, and 2-8 cm long. Flowers small and white in a dense, flat-topped inflorescence.
Douglas' Spiraea, Hardhack: Spiraea douglasii var. douglasii (Synonym: Spiraea douglasii ssp. douglasii) - Elongated, narrow inflorescence of pink flowers. Undersides of the leaves with a dense covering of whitish to grayish hairs.
Hardhack, Douglas' Spiraea, Rose Spiraea: Spiraea douglasii var. menziesii (Synonyms: Spiraea cuneifolia, Spiraea douglasii ssp. menziesii, Spiraea menziesii, Spiraea subvillosa) - Shrub to 6 feet. Elongated, narrow inflorescence of pink flowers. Undersides of the leaves are greenish. Leaves ovate with small serrations. Typically found in wet meadows, or along stream & lake banks.
Pyramid Spiraea: Spiraea X pyramidata (Synonyms: Spiraea x subvillosa, Spiraea menziesii var. pyramidata, Spiraea tomentulosa) - Shrub to 1 meter in height. Flowers small, white, and arranged in dense rounded to conical inflorescences.
Mountain Spiraea, Rose Meadowsweet, Subalpine Spiraea: Spiraea splendens (Synonyms: piraea betulifolia var. rosea, Spiraea densiflora, Spiraea densiflora ssp. densiflora, Spiraea densiflora ssp. splendens, Spiraea densiflora var. densiflora, Spiraea densiflora var. splendens, Spiraea lucida var. rosea, Spiraea splendens var. rosea, Spiraea splendens ssp. splendens, Spiraea splendens var. splendens) - Shrub to 1 meter in height. Leaves egg-shaped to elliptical and from 2-4 cm long with irregular, coarse teeth. Flowers very small and rose colored in a dense, flat-topped inflorescence.