Elatine chilensis A. Gray
Annotated by D. Mansfield, Jun 2017. Sources: Jepson II. Remarks: (according to Jepson Manual distinction between E. rubella & E. chilensis)

Oregon: Malheur County: Sheepshead Mountains, Inbetween Reservoir in the upper Ryegrass Creek drainage; 19 miles northwest of Burns Junction Elev. 5025 ft.
42.9657° N, 118.1278° W,
Datum: NAD 83. Uncertainty: 6 meters. Error radius calculated from georeference precision
Drying mud on receding shoreline of small stockpond. With Limosella aquatica, Ranunculus aquatilis, Plagiobothrys. Immature. Appears to be elatine cf. chilensis but determination is uncertain.

R. E. Brainerd 1406, May 27, 2009
With N. Otting
CIC, Accession: 38111