Bloomipedia
Blackbrush (Coleogyne ramosissima)
Photo: Anders Hastings via iNaturalist · CC BY 4.0 · resized

Flower profile

Blackbrush

Coleogyne ramosissima

Native in the lower 48

Blackbrush is a flowering plant 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 March–May.

5states
2of our state lists
2,959U.S. sightings*

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

On our lists for: Nevada, Utah

Quick look

Coleogyne ramosissima or blackbrush, is a low lying, dark grayish-green, aromatic, spiny, perennial, soft wooded shrub, native to the deserts of the southwestern United States. It is called blackbrush because the gray branches darken when wet by rains. It is in the rose family (Rosaceae) and is monotypic.

  • It belongs to the Rosaceae family. iNaturalist
  • USDA PLANTS describes it as a shrub with a perennial life cycle. USDA PLANTS
  • USDA PLANTS lists it as native in the lower 48 states and records it in 5 states. USDA PLANTS
  • NatureServe lists it as native to Utah and Nevada. NatureServe
  • In Utah, most iNaturalist sightings of it in flower come in April–May. iNaturalist
  • In Nevada, most iNaturalist sightings of it in flower come in March–May. iNaturalist
  • USDA PLANTS lists its flower color as yellow. 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 947 research-grade sightings of it in Utah, ranking #59 among the 109 flowers on our Utah list. iNaturalist
  • iNaturalist has 563 research-grade sightings of it in Nevada, ranking #70 among the 110 flowers on our Nevada list. iNaturalist

Blackbrush gift ideas

Handmade blackbrush gifts from independent makers.

When does it bloom?

Flowering records by month across the U.S. (iNaturalist research-grade observations marked “Flowering”) (387 records)
Bloom time in each of our 2 states
StateTypePeak bloomSightings*
UtahNativeApril–May947
NevadaNativeMarch–May563

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
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.
Nevada
Not listed Not on Nevada fully protected plants, critically endangered (NAC 527.010). NatureServe: S4, apparently secure in Nevada. NAC 527.010
Rare elsewhere
Other states where NatureServe ranks it rare or missing: 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), 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 blackbrush in 5 states.

recorded by USDA PLANTS on our state lists not recorded

See the full list of states

Arizona, California, Colorado, Nevada, Utah.

Utah counties with USDA records: Emery, Garfield, Grand, Kane, San Juan, Washington, Wayne.

Nevada counties with USDA records: Clark, Lincoln, Nye.

More Utah flowers

Sources