Petrophytum

Life-forms

Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Rosids
Cladus: Eurosids I
Ordo: Rosales

Familia: Rosaceae
Subfamilia: Amygdaloideae
Tribus: Spiraeeae
Genus: Petrophytum
Species: P. caespitosum - P. cinerascens – P. hendersonii

Name

Petrophytum (Nutt. ex Torr. & A.Gray) Rydb.
Synonyms

Petrophyton Rydb. (orth. var.)

Petrophytum (orth. var. Petrophyton) is a small genus of plants in the rose family known as the rock spiraeas or rockmats. These are low mat-forming shrubs which send up erect stems bearing spike inflorescences of flowers. The brushy flowers are white and have many stamens and hairy, thready pistils. Rockmats are native to western North America.

Species:

Petrophytum caespitosum — mat rock spiraea
Petrophytum cinerascens — halfshrub rockmat, Chelan rockmat
Petrophytum hendersonii — Olympic Mountain rockmat

References