Sidalcea hendersonii
Malvaceae
Henderson's Checker Mallow
Stems erect, hollow, usually tinted purplish, hairless [[ok? OK]]. Basal leaves with long petioles, heart-shaped, round-toothed; stem leaves alternate, palmately divided into 5 oblong lobes. Flowers numerous in branched racemes atop stems. Plants both female and bisexual. Bisexual flowers larger, pale. Female flowers 1/2 in., darker pink, lacking anthers. Sometimes confused with Lythrum salicaria, purple loosestrife, with red-purple flowers arranged in a spike-like raceme, which is invasive in same habitat. Grows along coast in tidal marshes and meadows. Extremely rare in Oregon, uncommon in Washington and rare in British Columbia.
- Rarity: Rare
- Flowering Time: Early Summer, Mid Summer, Late Summer
- Flower Form: 5 Petals-Many Stamens in central column
- Life Cycle: Perennial
- Height: 1–5 feet
- Habitat: Bog/Fen/Wetland, Coastal
- Found In: Olympic NP
- Native: Yes
