Erythranthe microphylla
(c) J Brew, some rights reserved (CC BY-SA) · licence
Family: Phrymaceae · Type: Annual · Native
Erythranthe microphylla is a native California annual in the Phrymaceae family, recognized by annual with flowers in leaf axils.
Erythranthe microphylla is a California native annual found in wet meadows, seeps, and streambanks from coastal to mountain regions at elevations of 20 to 1,700 meters. Flowering from March to August, this plant produces delicate yellow flowers with a tube-throat extending slightly beyond its asymmetric calyx. Growing with fibrous roots and slender stems 5 to 30 centimeters tall, it forms compact clusters in moist habitats. Its small elliptic to nearly round leaves measure 5 to 30 millimeters long, growing in opposite pairs along the stem. The fruit is 6 to 9 millimeters long, developing in an asymmetrically swollen calyx with unequal lobes.
Identification and appearance
Key characters: Geographically isolated; annual with flowers in leaf axils
Habitat and range
Habitat: Seeps, streambanks, wet meadows
Elevation: 20-1700 m
Outside California: to western Canada, Idaho, Nevada
Bloom period
Erythranthe microphylla blooms Mar-Aug.
Frequently asked questions
Is Erythranthe microphylla native to California?
Yes. Erythranthe microphylla is native to California (recorded as native).
When does Erythranthe microphylla bloom?
Erythranthe microphylla blooms Mar-Aug.
What plant family does Erythranthe microphylla belong to?
Erythranthe microphylla is in the Phrymaceae family, genus Erythranthe.
What habitat does Erythranthe microphylla grow in?
Erythranthe microphylla grows in Seeps, streambanks, wet meadows.
Related species
Other California species in the same genus, family, or bioregion.
Sources: Jepson eFlora
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.