Publication: Trans. Linn. Soc. London. 17: 414. 1836.
Origin: Native
selected vouchers: WTU
Notes: FNA5: "Variety strictum is infrequent and widely scattered throughout its range in west-central Idaho (Adams, Nez Perce, and Washington counties), northeastern Oregon (Douglas, Morrow, Umatilla, Union, and Wallowa counties), and southeastern Washington (Benton, Columbia, Douglas, Grant, Kittitas, and Yakima counties). Its greatest concentration is in the Blue Mountains of northeastern Oregon and extreme southeastern Washington."
References: (none)