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Low-Hop Clover, Field Clover, Large Hop Clover, Hop Trefoil - Trifolium campestre


Family: Fabaceae - Pea family Genus Common Name: Clover Native Status: IntroducedDicot Annual Perennial Herb
Trifolium campestre - Low-Hop Clover, Field Clover, Large Hop Clover, Hop Trefoil. This introduced species was originally brought to North America for fodder, but is now found wild in all but six states, and can be weedy and invasive. There are several "hop clover" species so named because the yellow flowers turn brown as they mature, and look like hops.

The original primary image I had on this page was actually not Trifolium campestre. It was of a similar-looking Medicago species. Thanks to Robert Flogaus-Faust for bringing my attention to this incorrect identification.

Found in:
AK, AL, AR, CA, CT, DC, DE, FL, GA, IA, ID, IL, IN, KS, KY, LA, MA, MD, ME, MI, MN, MO, MS, MT, NC, ND, NE, NH, NJ, NM, NY, OH, OK, OR, PA, RI, SC, TN, TX, VA, VT, WA, WI, WV, WY

Journal Articles Referencing Clover

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Trifolium campestre

Distribution of Trifolium campestre in the United States and Canada:
Map unavailable.
Map courtesy of The Biota of North America Program.
Map color key

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Site: Reed Branch Wet Meadow Preserve, Towns County, GA Date: 2010-April-30Photographer: Gerald C Williamson
Nikon D60
ISO100
Tamron SP 90MM f/2.8 AF Macro
90mm (135 equiv) Flash:
The Trifolium campestre blossom has more florets than some other hop clover species, having 20-40 florets. Similar T. dubium, for example, usually has less than 15 florets.
Trifolium campestre
Site: Reed Branch Wet Meadow Preserve, Towns County, GA Date: 2010-April-30Photographer: Gerald C Williamson
Nikon D60
1/1250f/5 ISO100
Tamron SP 90MM f/2.8 AF Macro
90mm (135 equiv) Flash:
The terminal leaflet of low-hop clover is on a fairly long petiole, with the side leaflets being sessile or nearly so. Similar Medicago lupulina has a tiny "tooth" at the end of the terminal leaflet; Trifolium campestre does not have this tooth.
Click on the photo for a larger image
Trifolium campestre
References used for identification and information:
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Trifolium campestre initially published on USWildflowers.com 2011-01-04; Updated 2015-06-25

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All content except USDA Plants Database map Copyright Gerald C. Williamson 2024
Photographs Copyright owned by the named photographer



Code Update 20230302