Publication: Catalogus Seminum et Sporarum in Horto Botanico Universitatis Imperialis Tokyoensis per annos 1915 et 1916 lectorums Imperialis Tokyoensis 30, no. 854. 1916.

Origin: Introduced

selected vouchers: WTU

Notes: Uncommon as a casual introduction in disturbed areas in Washington. Documented populations do not appear to be self-sustaining. They typically result from somebody leaving behind seeds, which germinate in the presence of water. The plants do not produce fruit.

References: (none)