Little hop clover

Trifolium dubium

''Trifolium dubium'', the lesser trefoil, suckling clover, little hop clover or lesser hop trefoil, is a flowering plant in the pea and clover family Fabaceae. This species is generally accepted as the primary plant to represent the traditional Irish shamrock.
Little Hop Clover (Trifolium dubium) INTRODUCED. Growing in a backyard habitat. Geotagged,Spring,Trifolium dubium,United States

Distribution

It is native to Europe, but can be found in many parts of the world as an introduced species. It is probably an allotetraploid with 2n=32 that arose from the crossing of ''Trifolium campestre'' and ''T. micranthum''.

References:

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Taxonomy
KingdomPlantae
DivisionAngiosperms
ClassEudicots
OrderFabales
FamilyFabaceae
GenusTrifolium
SpeciesT. dubium
Photographed in
Belgium
Netherlands
United States of America