Flower profile
Coastal manroot
Marah oregana
Coastal manroot (Marah oregana) is a flowering plant in the Cucurbitaceae family, blooming mostly March–June across the U.S.
Coastal manroot is a flowering plant. It's on our flower lists for 2 states, and across the U.S. it's most often seen in bloom in March–June.
*iNaturalist research-grade observations, as of October 17, 2026.
On our lists for: Oregon, Washington
Quick look
Marah oregana, the Oregon manroot, coastal manroot or western wild-cucumber, is a common manroot of the northwest coast of the United States. It ranges from California north to Vancouver Island in southwestern Canada.
- It belongs to the Cucurbitaceae family. iNaturalist
- NatureServe lists it as native to Oregon and Washington. NatureServe
- In Oregon, most iNaturalist sightings of it in flower come in April–June. iNaturalist
- In Washington, most iNaturalist sightings of it in flower come in April–June. iNaturalist
- iNaturalist has 6,157 research-grade sightings of it in Oregon, ranking #7 among the 184 flowers on our Oregon list. iNaturalist
- iNaturalist has 2,345 research-grade sightings of it in Washington, ranking #79 among the 187 flowers on our Washington list. iNaturalist
When does it bloom?
Bloom time in the 2 states whose Bloomipedia list includes it
| State | Type | Peak bloom | Sightings* |
|---|---|---|---|
| Oregon | Native | April–June | 6,157 |
| Washington | Native | April–June | 2,345 |
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
- Oregon
- Not listed Not on Oregon endangered and threatened plants (OAR 603-073-0070). NatureServe: SNR, not yet ranked in Oregon. OAR 603-073-0070
- 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.
- Rare elsewhere
- No other U.S. state ranks it S1, S2, SH or SX.
Checked October 17, 2026. Rankings and lists can change, so follow the links for the latest.
Can you eat it?
None of the sources we checked (NC State Extension (no page for this plant)) say whether it's edible or poisonous for people.
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.
Where does it grow?
USDA PLANTS has no state-by-state distribution for this name, so we can't map it yet.
Names, range and relatives
Other Marah on Bloomipedia (2): Chilicothe, California manroot.
More from the Cucurbitaceae family (7 on Bloomipedia; most observed first): Buffalo gourd, Creeping cucumber, Bitter melon, Oneseed bur cucumber, Ivy gourd.
More Oregon flowers
Sources
- USDA PLANTS: no profile matched this name.
- iNaturalist, Marah oregana: taxonomy, research-grade observation counts and “Flowering” annotations, retrieved October 17, 2026.
- Wikipedia, Marah oregana (lead quoted under CC BY-SA 4.0).
- Oregon: Oregon endangered and threatened plants (OAR 603-073-0070).
- Oregon: Oregon noxious weed quarantine, A and B weeds (OAR 603-052-1200).
- Washington: Washington State noxious weed list (WAC 16-750-005, -011, -015).
- USFWS, ECOS species database (ESA listing check), October 17, 2026.
- NatureServe Explorer, Marah oregana (global and state ranks).
- Edibility and toxicity: no source found (marked "not well documented").
- Photo: Harry Podschwit via iNaturalist · CC BY 4.0 · resized.