Micranthes rufidula Small
Annotated by Adrienne C. Basey, 25 Mar 2017. Sources: Plants of Western Oregon, Washington & British Columbia.

Oregon: Clackamas County: Willamette Narrows Forest; 4.1 miles southwest of Oregon City on the west bank of the Willamette River. Elev. 16 m.
45.31394° N, -122.66524° W
Datum: WGS 84. Uncertainty: 2 meters. Coordinate Source: Digital Map.
Prairie grassland. Found on seepy thin, organic, soil over basalt outcrop. Stamen filaments wider at base and narrow toward the top. Inflorescence somewhat flat topped. Plants became more numerous and clumped near the current high water line and were even vegetative under the flooding waters. Associated species: Delphinium leucophaeum, Sedum lanceolatum, Rumex acetosella, Brodiaea species. Phenology: Flowers.

Adrienne C. Basey 128, Mar 25, 2017
HPSU, Accession: 18680