Trifolium dubium, the lesser trefoil, lesser hop trefoil or suckling clover is a plant in the family Fabaceae. This species is generally accepted as the primary plant to represent the traditional Irish shamrock.
It is native to Europe, but can be found in many parts of the world as an introduced species.
- "BSBI List 2007". Botanical Society of Britain and Ireland. Archived from the original (XLS) on 2015-02-25. Retrieved 2014-10-17.
- Cooper, P. Shamrock shortage in Ireland sparks St. Pat's fears. Irish Central.
- Ansari, H. A., et al. (2008). Molecular and cytogenetic evidence for an allotetraploid origin of Trifolium dubium (Leguminosae). Chromosoma 117(2):159-67.
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