Flower profile
Bulbous woodland star
Lithophragma glabrum
Bulbous woodland star is a wildflower that USDA PLANTS lists as native in the lower 48 states. In Idaho it's most often seen in bloom in March–June.
*iNaturalist research-grade observations, as of October 17, 2026.
On our lists for: Idaho
Quick look
Lithophragma glabrum is a slender perennial western North American mountain plant in the Saxifrage family (Saxifragaceae), known by the common names bulbous woodland star, bulbiferous prairie-star, smooth woodland star, and smooth rockstar.
- It belongs to the Saxifragaceae 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 Idaho. NatureServe
- In Idaho, most iNaturalist sightings of it in flower come in March–June. iNaturalist
- iNaturalist has 453 research-grade sightings of it in Idaho, ranking #84 among the 109 flowers on our Idaho list. iNaturalist
Bulbous woodland star gift ideas
Handmade bulbous woodland star 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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Bulbous woodland star art print
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Bulbous woodland star greeting card
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Bulbous woodland star mug
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Bulbous woodland star earrings
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Bulbous woodland star embroidery pattern
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Bulbous woodland star sticker
When does it bloom?
In Idaho, most flowering sightings come in March–June.
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
- 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: SD (S1). (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?
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.
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 bulbous woodland star in 10 states.
recorded by USDA PLANTS on our state lists not recorded
See the full list of states
California, Colorado, Idaho, Montana, Nevada, Oregon, South Dakota, Utah, Washington, Wyoming.
Idaho counties with USDA records: Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, Boise, Bonneville, Camas, Canyon, Caribou, Cassia, Clark, Clearwater, Custer, Elmore, Franklin, Fremont, Gem, Gooding, Idaho, Kootenai, Latah, Lemhi, Lincoln, Madison, Nez Perce, Owyhee, Power, Shoshone, Twin Falls, Valley, Washington.
More Idaho flowers
Sources
- USDA, NRCS. PLANTS Database, profile LIGL2.
- iNaturalist, Lithophragma glabrum: taxonomy, research-grade observation counts and “Flowering” annotations, retrieved October 17, 2026.
- Wikipedia, Lithophragma glabrum (lead quoted under CC BY-SA 4.0).
- Idaho: Idaho noxious weeds (IDAPA 02.06.09, Section 220).
- USFWS, ECOS species database (ESA listing check), October 17, 2026.
- NatureServe Explorer, Lithophragma glabrum (global and state ranks).
- Edibility and toxicity: no source found (marked "not well documented").
- Photo: Mark Pollock via iNaturalist · CC BY 4.0 · resized.