Distribution: Occurring east of the Cascades crest in southeastern Washington; southeastern Washington to California, east to Montana, Idaho, New Mexico, Texas, and South Dakota.
Habitat: Dry, limy or granite cliffs, ledges, talus, and rocky slopes, lowland to alpine.
Flowers: June-August
Origin: Native
Growth Duration: Perennial
Conservation Status: Endangered in Washington (WANHP)
Pollination: Bees
[none provided]
Publication: Mem. New York Bot. Gard. 1: 206. 1900.
Luetkea caespitosa (Nutt.) Kuntze
Spiraea caespitosa Nutt.
- ssp. caespitosum – Rocky Mountain rockmat Occurring east of the Cascades crest in southeastern Washington; southeastern Washington to California, east to Montana, Idaho, New Mexico, Texas, and South Dakota.
PNW Herbaria: Specimen records of Petrophytum caespitosum in the Consortium of Pacific Northwest Herbaria database.
WA Flora Checklist: Petrophytum caespitosum checklist entry.
OregonFlora: Petrophytum caespitosum information.
E-Flora BC: Petrophytum caespitosum atlas page.
CalPhotos: Petrophytum caespitosum photos.
USDA Plants: Petrophytum caespitosum information.
