Publication: Erythea 6(5): 51. 1898.
Origin: Native
selected vouchers: WTU
Notes: Listings by various authors (e.g. KZ) of C. sulphurea Rydb. for WA are attributable to yellow forms of C. elmeri; there is no convincing evidence that C. sulphurea, which is primarily a Rocky Mountain species, occurs in WA.
References: (none)