Erythranthe marmorata
Stanislaus monkeyflower
(c) Trevor Van Loon, some rights reserved (CC BY), uploaded by Trevor Van Loon · licence
Family: Phrymaceae · Type: Annual · Native
Conservation status: CNPS 1B.1
Erythranthe marmorata (Stanislaus monkeyflower) is a native California annual in the Phrymaceae family, recognized by annual with unequal calyx lobes.
Stanislaus monkeyflower is a rare (CNPS 1B.1) California native annual found in central California on streambanks and seeps at elevations of 100 to 900 meters. Flowering from March to May, this plant produces yellow flowers with a distinctive tubular throat that extends 4 to 5 millimeters beyond the calyx. Growing 7 to 28 centimeters tall with glandular hairy stems, it has a delicate and somewhat sprawling form. Its leaves are ovate to elliptic, measuring 15 to 30 millimeters long with petioles 7 to 15 millimeters in length. Flowers emerge individually from the axils of the plant's upper leaves, creating a subtle and intricate botanical display.
Identification and appearance
Key characters: Geographically isolated; annual with unequal calyx lobes
Habitat and range
Habitat: Seeps, streambanks
Elevation: 100-900 m
Bloom period
Erythranthe marmorata blooms Mar-May.
Conservation status
CNPS 1B.1
Frequently asked questions
Is Erythranthe marmorata native to California?
Yes. Erythranthe marmorata is native to California (recorded as native).
When does Erythranthe marmorata bloom?
Erythranthe marmorata blooms Mar-May.
What plant family does Erythranthe marmorata belong to?
Erythranthe marmorata is in the Phrymaceae family, genus Erythranthe.
Is Erythranthe marmorata rare or endangered?
Erythranthe marmorata carries California Rare Plant Rank 1B.1, state rank S2?.
What habitat does Erythranthe marmorata grow in?
Erythranthe marmorata grows in Seeps, streambanks.
Related species
Other California species in the same genus, family, or bioregion.
Sources: Jepson eFlora · CDFW CNDDB
Last updated 2026-10-06
Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Cal-IPC, and more.