Myosurus sessilis S. Watson
Annotated by Vernon M. Marttala, 11 Jul 2006. Remarks: Topotype of Myosurus sessilis S. Wats.

Oregon: Umatilla County: [locality and coordinates withheld; status in Oregon: S1 (Critically Imperiled; OBIC)],
#562 is not Howell's original collection number, but was added later as an ID number when cataloging the Howell-Flinn collection. Isotype: Myosurus sessilis S. Watson. Published 1882. Proceedings of the American Academy of Arts and Sciences 17: 362.

Thomas J. Howell s.n., May 8, 1882
HPSU, Accession: 10303