Bloomipedia
Sickletop lousewort (Pedicularis racemosa)
Photo: Loren Cassin Sackett via iNaturalist · CC BY 4.0 · resized

Flower profile

Sickletop lousewort

Pedicularis racemosa

Native in the lower 48

Sickletop lousewort is a wildflower that USDA PLANTS lists as native in the lower 48 states. It's on our flower lists for 2 states, and across the U.S. it's most often seen in bloom in July–September.

10states
2of our state lists
6,241U.S. sightings*

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

On our lists for: Colorado, Wyoming

Quick look

Pedicularis racemosa is a species of flowering plant in the family Orobanchaceae known by the common names sickletop lousewort and leafy lousewort. It is native to western North America, where it grows in coniferous forests. This is a perennial herb producing several stems up to 80 centimetres (31 in) tall, greenish to dark red in color.

  • It belongs to the Orobanchaceae family. iNaturalist
  • USDA PLANTS describes it as an herb (forb) / a subshrub 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 and Wyoming. NatureServe
  • In Colorado, most iNaturalist sightings of it in flower come in July–August. iNaturalist
  • iNaturalist has 1,763 research-grade sightings of it in Colorado, ranking #93 among the 110 flowers on our Colorado list. iNaturalist
  • iNaturalist has 528 research-grade sightings of it in Wyoming, ranking #53 among the 107 flowers on our Wyoming list. iNaturalist

Sickletop lousewort gift ideas

Handmade sickletop lousewort gifts from independent makers.

When does it bloom?

Flowering records by month across the U.S. (iNaturalist research-grade observations marked “Flowering”) (551 records)
Bloom time in each of our 2 states
StateTypePeak bloomSightings*
ColoradoNativeJuly–August1,763
WyomingNativefew records528

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.
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.
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?

For peopleNot well documented

None of the sources we checked (NC State Extension (no page for this plant), USDA PLANTS) 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.

Where does it grow?

USDA PLANTS records sickletop lousewort in 10 states.

recorded by USDA PLANTS on our state lists not recorded

See the full list of states

Arizona, California, Colorado, Idaho, Montana, New Mexico, Oregon, Utah, Washington, Wyoming.

Colorado counties with USDA records: Archuleta, Boulder, Clear Creek, Delta, Dolores, Garfield, Gilpin, Grand, Gunnison, Hinsdale, Huerfano, Jackson, Larimer, Mesa, Mineral, Montezuma, Montrose, Ouray, Park, Pitkin, Routt, Saguache, San Juan, San Miguel, Summit.

Wyoming counties with USDA records: Albany, Carbon, Fremont, Lincoln, Park, Sheridan, Sublette, Teton.

More Colorado flowers

Sources