Asclepias cordifolia (Benth.) Jeps.
Annotated by [needs research], 2015.

Oregon: Josephine: From Redwood Hwy. take Eight Dollar Mountain Rd. (NF 4201); stay on the road until it crosses the bridge over the Illinois River. Elev. 2273 ft.
42.248561° N, 123.706347° W,
Coordinate Source: OrlookId: 109433, StateProvince: Oregon, County: Josephine, LocName: Lat 42 Deg 14 Min 54.82 Sec; Lon -123 Deg 42 Min 22.85 Sec. OregonFlora 1994-2020 methodology.
None. Https://oregonflora.org/collections/individual/index.php?occid=2311074. Phenology: flowering.

[needs research]; King OR110-1010, Jun 8, 2015
With Johnson, Vandruff
OSC, Catalog: OSC-V-040242, Accession Number: OSC248178