Similar species: Yellow Vetchling (Lathyrus pratensis) - Very similar, except the flowers attach at various points along the stem (as opposed to radiating out from a single point). Also the leaves are quite different.
PLEASE NOTE: A coloured Province or State means this species occurs somewhere in that Province/State.
The entire Province/State is coloured, regardless of where in that Province/State it occurs.
(Range map provided courtesy of the USDA website
and is displayed here in accordance with their
Policies)