Flower profile

Lewis' monkeyflower

Erythranthe lewisii

Lewis' monkeyflower is a flowering plant. It's on our flower lists for 4 states, and across the U.S. it's most often seen in bloom in July–September.

–states

4of our state lists

6,980U.S. sightings*

*iNaturalist research-grade observations, as of October 17, 2026.

On our lists for: Idaho, Montana, Washington, Wyoming

Quick look

Erythranthe lewisii is a perennial plant in the family Phrymaceae. It is named in honor of explorer Meriwether Lewis. Together with other species in Erythranthe, it serves as a model system for studying pollinator-based reproductive isolation. It was formerly known as Mimulus lewisii.
From Wikipedia's article Erythranthe lewisii, CC BY-SA 4.0.

It belongs to the Phrymaceae family. ^iNaturalist
NatureServe lists it as native to Washington, Montana, Wyoming and Idaho. ^NatureServe
In Washington, most iNaturalist sightings of it in flower come in July–September. ^iNaturalist
In Montana, most iNaturalist sightings of it in flower come in July–August. ^iNaturalist
iNaturalist has 2,818 research-grade sightings of it in Washington, ranking #64 among the 110 flowers on our Washington list. ^iNaturalist
iNaturalist has 1,086 research-grade sightings of it in Montana, ranking #24 among the 109 flowers on our Montana list. ^iNaturalist
iNaturalist has 730 research-grade sightings of it in Wyoming, ranking #28 among the 107 flowers on our Wyoming list. ^iNaturalist

Lewis' monkeyflower gift ideas

Handmade lewis' monkeyflower gifts from independent makers.

🌱 Sample spot. Handmade gift picks from independent shops will appear here once our shop partnership is approved. These cards are placeholders, not real products.

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Lewis' monkeyflower art print
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Lewis' monkeyflower greeting card
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Lewis' monkeyflower mug
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Lewis' monkeyflower earrings
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Lewis' monkeyflower embroidery pattern
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Lewis' monkeyflower sticker
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When does it bloom?

Flowering records by month across the U.S. (iNaturalist research-grade observations marked “Flowering”) (1,942 records)

Bloom time in each of our 4 states

State	Type	Peak bloom	Sightings*
Washington	Native	July–September	2,818
Montana	Native	July–August	1,086
Wyoming	Native	July–August	730
Idaho	Native	July–August	464

Conservation status

Federal (U.S. ESA): Not listed No U.S. Endangered Species Act listing in the USFWS ECOS database. ^{USFWS ECOS}
NatureServe global: G5 Secure worldwide. ^NatureServe
Washington: No list Washington has no state law listing endangered or threatened plants (the Washington Natural Heritage Program's rare plant list isn't regulatory), so we show NatureServe's Washington ranks instead. NatureServe: SNR, not yet ranked in Washington.
Montana: No list Montana has no state law listing endangered or threatened plants, so we show NatureServe's Montana ranks instead. NatureServe: S4, apparently secure in Montana.
Wyoming: No list Wyoming has no state law listing endangered or threatened plants, so we show NatureServe's Wyoming ranks instead. NatureServe: S4, apparently secure in Wyoming.
Idaho: No list Idaho has no state law listing endangered or threatened plants, so we show NatureServe's Idaho ranks instead. NatureServe: SNR, not yet ranked in Idaho.
Rare elsewhere: Other states where NatureServe ranks it rare or missing: AK (S2), CO (S2). (S1 critically imperiled, S2 imperiled, SH possibly extirpated, SX presumed extirpated.)

Checked October 17, 2026. Rankings and lists can change, so follow the links for the latest.

Can you eat it?

For peopleNot well documented

None of the sources we checked (NC State Extension (no page for this plant)) say whether it's edible or poisonous for people.

For petsNot well documented

It isn't on the ASPCA plant list.

🌿 Never eat a wild plant unless you're certain of its ID; this isn't medical advice. Worried about a person? Call Poison Control at 1-800-222-1222. Worried about a pet? Call your vet.