Sidalcea calycosa ssp. rhizomata is a perennial herb (rhizomatous) that is native to California, and endemic (limited) to California.
California Rare Plant Rank: 1B.2 (rare, threatened, or endangered in CA and elsewhere).
[wildflower.org] Characteristics, Bloom Info, Habitat: Plant Characteristics
Duration: Annual , Perennial
Habit: Herb
Fruit Type: Schizocarp
Size Notes: Up to about 3 feet tall.
Bloom Information
Bloom Color: White , Pink , Purple
Bloom Time: Apr , May , Jun , Jul , Aug , Sep
Bloom Notes: Pale pink or purple, rarely white. Base of petals paler or white.
Distribution
USA: CA
Native Habitat: Freshwater and salt marshes near coast. (link added by Mary Ann Machi)
Calflora:
Information on California plants for education, research and conservation,
with data contributed by
public and private institutions and individuals.
[web application]. 2025.The Calflora Database
[a non-profit organization].Available:
https://www.calflora.org/(Accessed: 03/30/2025).
one or more occurrences