Prunus spinosa L.

YAKIMA COUNTY, WASHINGTON
U.S.A.
Prunus spinosa L. Rosaceae
1.5 m tall colonial shrubs, forming
thickets, thorns 21-40 mm, pedicels 2.5-
11 mm, fruit glaucous, blue, dull, black
and shiny if rubbed, globose to ellipsoid,
10-16 x 10-15 mm, pits 7.3-11.3 x 5.6-
9.1 mm; partly shaded, with Ulmus
pumila, Prunus virginiana, P. domestica,
floodplain of Sand Creek, near junction of
Pumphouse Road and Route 97, elev. 225
m, 46.31° N, 120.35° W
7 Oct 2019 Coll. Peter F. Zika 29801
04382323