Erythranthe hardhamiae
Hardham's 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 hardhamiae (Hardham's monkeyflower) is a native California annual in the Phrymaceae family, recognized by rare annual with deep pink to purple flowers.
Hardham's monkeyflower is a rare (CNPS 1B.1) California native annual found in chaparral openings at elevations of 300 to 500 meters. Flowering from March to May, this plant produces deep pink to purple flowers with notched lobes in delicate, branching arrangements. Growing with puberulent stems 2 to 13 centimeters tall, it appears as a diminutive and subtle botanical treasure. Its leaves are slender, ranging from 2 to 12 millimeters long and 1 to 3 millimeters wide, with a linear to oblanceolate shape. The fruit develops 2 to 5 millimeters long, nestled within a membranous calyx.
Identification and appearance
Key characters: Geographically isolated; rare annual with deep pink to purple flowers
Habitat and range
Habitat: Openings in chaparral
Elevation: 300-500 m
Bloom period
Erythranthe hardhamiae blooms Mar-May.
Conservation status
CNPS 1B.1
Frequently asked questions
Is Erythranthe hardhamiae native to California?
Yes. Erythranthe hardhamiae is native to California (recorded as native).
When does Erythranthe hardhamiae bloom?
Erythranthe hardhamiae blooms Mar-May.
What plant family does Erythranthe hardhamiae belong to?
Erythranthe hardhamiae is in the Phrymaceae family, genus Erythranthe.
Is Erythranthe hardhamiae rare or endangered?
Erythranthe hardhamiae carries California Rare Plant Rank 1B.1, state rank S1.
What habitat does Erythranthe hardhamiae grow in?
Erythranthe hardhamiae grows in Openings in chaparral.
Related species
Other California species in the same genus, family, or bioregion.
Sources: Jepson eFlora · CDFW CNDDB
Last updated 2026-09-30
Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Cal-IPC, and more.