trefoil

1. Any of several Old World herbs of the genus Medicago having small flowers and trifoliate compound leaves (synset 112568785)
   is a type of: herb, herbaceous plant - a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests
   subtypes:

   • medicago arborea, moon trefoil - evergreen shrub of southern European highlands having downy foliage and a succession of yellow flowers throughout the summer followed by curious snail-shaped pods
   • medicago falcata, sickle alfalfa, sickle lucerne, sickle medick - European medic naturalized in North America having yellow flowers and sickle-shaped pods
   • calvary clover, medicago echinus, medicago intertexta - an annual of the Mediterranean area having spiny seed pods and leaves with dark spots
   • black medick, hop clover, medicago lupulina, nonesuch clover, yellow trefoil - prostrate European herb with small yellow flowers and curved black pods; naturalized in North America
   • alfalfa, lucerne, medicago sativa - important European leguminous forage plant with trifoliate leaves and blue-violet flowers grown widely as a pasture and hay crop
   belongs to: genus medicago, medicago - a genus of herbs that resemble clover
   same as: medic, medick
2. A plant of the genus Trifolium (synset 111773047)
   is a type of: herb, herbaceous plant - a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests
   subtypes:

   • alpine clover, trifolium alpinum - European mountain clover with fragrant usually pink flowers
   • hop clover, lesser yellow trefoil, shamrock, trifolium dubium - clover native to Ireland with yellowish flowers; often considered the true or original shamrock
   • crimson clover, italian clover, trifolium incarnatum - southern European annual with spiky heads of crimson flower; extensively cultivated in United States for forage
   • purple clover, red clover, trifolium pratense - erect to decumbent short-lived perennial having red-purple to pink flowers; the most commonly grown forage clover
   • buffalo clover, trifolium reflexum, trifolium stoloniferum - clover of western United States
   • dutch clover, shamrock, trifolium repens, white clover - creeping European clover having white to pink flowers and bright green leaves; naturalized in United States; widely grown for forage
   belongs to: genus trifolium, trifolium - any leguminous plant having leaves divided into three leaflets
   same as: clover
3. An architectural ornament in the form of three arcs arranged in a circle (synset 104485492)
   is a type of: architectural ornament - (architecture) something added to a building to improve its appearance

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