Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to northwest California, east to Idaho and Montana.
Habitat: Shady woods, wet meadows and swamps, low to mid-elevations.
Flowers: April-June
Origin: Native
Growth Duration: Perennial
Conservation Status: Not of concern
Slender herbaceous perennial from rhizomes, often with stolons, the flowering stems glandular-pubescent, 2-4 dm. tall.
Basal leaves long-petiolate, the blades cordate, 5-lobed + their length, 3-7 cm. broad, lobes with rounded teeth; cauline leaves 1-3, much reduced.
Inflorescence an elongate raceme, up to 20 cm. long and 25-flowered, blossoming from the top downward; pedicels 2-8 mm. long; calyx cup-shaped, greenish, 5-6 mm. broad, the 5 lobes deltoid-ovate, spreading, about the same length as the tubular portion; petals 3-4 mm. long, greenish and purplish-based, pinnately divided into 8 filiform, often paired segments; stamens 5, opposite the calyx lobes.
Ovary inferior; carpels 2.
PNW Herbaria: Specimen records of Mitellastra caulescens in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Mitellastra caulescens checklist entry
OregonFlora: Mitellastra caulescens information
E-Flora BC: Mitellastra caulescens atlas page
CalPhotos: Mitellastra caulescens photos