Clover

For other uses, see Clover (disambiguation).

Clover
clover inflorescence
Scientific classification
Kingdom: Plantae Division: Magnoliophyta Class: Magnoliopsida Order: Fabales Family: Fabaceae Subfamily: Faboideae Tribe: Trifolieae Genus: Trifolium L.
Species
See text

Clover (Trifolium), or trefoil, is a genus of about 300 species of plants in the pea family Fabaceae. The genus has a cosmopolitan distribution; the highest diversity is found in the temperate Northern Hemisphere, but many species also occur in South America and Africa, including at high altitudes on mountains in the tropics.

They are small annual, biennial, or short-lived perennial herbaceous plants. The leaves are trifoliate (rarely 5- or 7-foliate), with stipules adnate to the leaf-stalk, and heads or dense spikes of small red, purple, white, or yellow flowers; the small, few-seeded pods are enclosed in the calyx.

Other closely related genera often called clovers include Melilotus (sweet clover) and Medicago (alfalfa or \'calvary clover\'). The "shamrock" of popular iconography is sometimes considered to be young clover.

The scientific name derives from the Latin tres, "three", and folium, "leaf", so called from the characteristic form of the leaf, which has three leaflets (trifoliate); hence the popular name trefoil. Clovers are used as food plants by the larvae of some Lepidoptera species; see list of Lepidoptera that feed on clovers.

Red clover (Trifolium pratense)

Contents 1 Selected species 2 Symbolism and mythology

Selected species

A closeup of clover in Ireland

Trifolium africanum Trifolium albopurpureum Trifolium alexandrinum Trifolium amabile Trifolium ambiguum Trifolium amoenum Trifolium andersonii Trifolium andinum Trifolium angustifolium Trifolium arvense Trifolium attenuatum Trifolium aureum Trifolium barbigerum Trifolium beckwithii Trifolium bejariense Trifolium bifidum Trifolium bolanderi Trifolium brandegeei Trifolium breweri Trifolium buckwestiorum Trifolium calcaricum Trifolium campestre Trifolium carolinianum Trifolium cernuum Trifolium ciliolatum Trifolium cyathiferum Trifolium dalmaticum Trifolium dasyphyllum Trifolium dedeckerae Trifolium depauperatum Trifolium dichotomum Trifolium douglasii Trifolium dubium Trifolium echinatum

Trifolium eriocephalum Trifolium fragiferum Trifolium friscanum Trifolium fucatum Trifolium glomeratum Trifolium gracilentum Trifolium gymnocarpon Trifolium haydenii Trifolium hirtum Trifolium howellii Trifolium hybridum Trifolium incarnatum Trifolium jokerstii Trifolium kingii Trifolium lappaceum Trifolium latifolium Trifolium leibergii Trifolium lemmonii Trifolium longipes Trifolium lupinaster Trifolium macraei Trifolium macrocephalum Trifolium medium Trifolium michelianum Trifolium microcephalum Trifolium microdon Trifolium minutissimum Trifolium monanthum Trifolium mucronatum Trifolium nanum Trifolium neurophyllum Trifolium nigrescens Trifolium obtusiflorum Trifolium oliganthum

Trifolium olivaceum Trifolium ornithopodioides Trifolium owyheense Trifolium parryi Trifolium pinetorum Trifolium plumosum Trifolium polymorphum Trifolium pratense Trifolium productum Trifolium purpureum Trifolium pygmaeum Trifolium reflexum Trifolium repens Trifolium resupinatum Trifolium rollinsii Trifolium rueppellianum Trifolium scabrum Trifolium semipilosum Trifolium siskiyouense Trifolium spumosum Trifolium squamosum Trifolium stoloniferum Trifolium striatum Trifolium subterraneum Trifolium suffocatum Trifolium thompsonii Trifolium tomentosum Trifolium trichocalyx Trifolium uniflorum Trifolium variegatum Trifolium vesiculosum Trifolium virginicum Trifolium willdenowii Trifolium wormskioldii

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Symbolism and mythology

A four-leaf clover

Shamrock, the traditional Irish symbol coined by Saint Patrick for the Holy Trinity, is commonly associated with clover, though also sometimes with Oxalis species, which also have trifoliate leaves.

Clovers occasionally have leaves with four leaflets, instead of the usual three. These four-leaf clovers, like other rarities, are considered lucky.

A common idiom is "to be in clover", meaning to be living a carefree life of ease, comfort, or prosperity.

The cloverleaf interchange is named for the resemblance to the leaves of a (four-leafed) clover when viewed from the air.

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Trifolium

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Trifolium

• This article incorporates text from the Encyclopædia Britannica Eleventh Edition, a publication now in the public domain.
• Quattrofolium

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