
Flower profile
Corn lily
Veratrum californicum
Corn lily is a wildflower that USDA PLANTS lists as native in the lower 48 states. It's on our flower lists for 4 states, and across the U.S. it's most often seen in bloom in June–August.
*iNaturalist research-grade observations, as of October 17, 2026.
On our lists for: Colorado, Nevada, New Mexico, Utah
Quick look
Veratrum californicum is an extremely poisonous plant native to western North America, including the Sierra Nevada and Rocky Mountains, as far north as Washington and as far south as Durango; depending on latitude, it grows from near sea level to as high as 11,000 feet. It grows 1 to 2 meters tall, with an erect, unbranched, heavily leafy stem resembling a cornstalk.
- It belongs to the Melanthiaceae family. iNaturalist
- USDA PLANTS describes it as an herb (forb) with a perennial life cycle. USDA PLANTS
- USDA PLANTS lists it as native in the lower 48 states and records it in 10 states. USDA PLANTS
- NatureServe lists it as native to Colorado, Utah, New Mexico and Nevada. NatureServe
- In Colorado, most iNaturalist sightings of it in flower come in June–August. iNaturalist
- In Utah, most iNaturalist sightings of it in flower come in July–August. iNaturalist
- USDA PLANTS lists its flower color as white. USDA PLANTS
- USDA PLANTS gives its bloom period as mid spring. USDA PLANTS
- USDA PLANTS lists a mature height of about 6 ft. USDA PLANTS
- iNaturalist has 2,442 research-grade sightings of it in Colorado, ranking #61 among the 110 flowers on our Colorado list. iNaturalist
- iNaturalist has 985 research-grade sightings of it in Utah, ranking #57 among the 109 flowers on our Utah list. iNaturalist
- iNaturalist has 591 research-grade sightings of it in New Mexico, ranking #98 among the 109 flowers on our New Mexico list. iNaturalist
Corn lily gift ideas
Handmade corn lily 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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Corn lily art print
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Corn lily greeting card
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Corn lily mug
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Corn lily earrings
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Corn lily embroidery pattern
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Corn lily sticker
When does it bloom?
Bloom time in each of our 4 states
| State | Type | Peak bloom | Sightings* |
|---|---|---|---|
| Colorado | Native | June–August | 2,442 |
| Utah | Native | July–August | 985 |
| New Mexico | Native | few records | 591 |
| Nevada | Native | few records | 423 |
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
- Colorado
- No list Colorado has no state law listing endangered or threatened plants, so we show NatureServe's Colorado ranks instead. NatureServe: S4, apparently secure in Colorado.
- Utah
- No list Utah has no state law listing endangered or threatened plants, so we show NatureServe's Utah ranks instead. NatureServe: SNR, not yet ranked in Utah.
- New Mexico
- Not listed Not on New Mexico state endangered plant species (19.21.2.9 NMAC). NatureServe: SNR, not yet ranked in New Mexico. 19.21.2.9 NMAC
- Nevada
- Not listed Not on Nevada fully protected plants, critically endangered (NAC 527.010). NatureServe: S3, vulnerable in Nevada. NAC 527.010
- Rare elsewhere
- Other states where NatureServe ranks it rare or missing: MT (S2), WY (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.
Please don't pick or dig this flower: NatureServe ranks it S3 in Nevada. NatureServe
Can you eat it?
USDA PLANTS rates its toxicity as “severe.” (USDA's rating covers people and livestock and doesn't say which parts.) NC State Extension has no page for it. USDA PLANTS
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 records corn lily in 10 states.
recorded by USDA PLANTS on our state lists not recorded
See the full list of states
Arizona, California, Idaho, Montana, Nevada, New Mexico, Oregon, Utah, Washington, Wyoming.
Utah counties with USDA records: Box Elder, Cache, Davis, Duchesne, Millard, Rich, Salt Lake, San Juan, Sanpete, Sevier, Summit, Tooele, Uintah, Utah, Wasatch, Washington, Weber.
New Mexico counties with USDA records: Colfax, Los Alamos, Mora, Rio Arriba, San Juan, San Miguel, Sandoval, Santa Fe, Taos, Torrance.
More Colorado flowers
Sources
- USDA, NRCS. PLANTS Database, profile VECA2.
- iNaturalist, Veratrum californicum: taxonomy, research-grade observation counts and “Flowering” annotations, retrieved October 17, 2026.
- Wikipedia, Veratrum californicum (lead quoted under CC BY-SA 4.0).
- Colorado: Colorado noxious weed lists A, B and C (8 CCR 1206-2, eff. May 15, 2025).
- Utah: Utah noxious weed list (Utah Admin. Code R68-9-3).
- New Mexico: New Mexico state endangered plant species (19.21.2.9 NMAC).
- New Mexico: New Mexico Noxious Weed List (NM Department of Agriculture, updated June 2020).
- Nevada: Nevada fully protected plants, critically endangered (NAC 527.010).
- Nevada: Nevada noxious weeds (NAC 555.010).
- USFWS, ECOS species database (ESA listing check), October 17, 2026.
- NatureServe Explorer, Veratrum californicum (global and state ranks).
- Edibility and toxicity: USDA PLANTS.
- Photo: Anders Hastings via iNaturalist · CC BY 4.0 · resized.


