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Aquatic fern bearing 4 parted leaf resembling 'Four-leaf clover' (Trifolium).Leaves floating in deep water or erect in shallow water or on land. Leaflets obdeltoid, to 3/4" long, glaucous, petioles to 8" long; Sporocarp (ferns) ellipsoid, to 3/16" long, dark brown, on stalks to 3/4" long, attached to base of petioles.
Other plants may be mistaken for, or misleadingly sold as, "4-leaf clovers"; for example, Oxalis tetraphylla is a species of wood sorrel with leaves resembling a 4-leaf clover. [ 25 ] [ 26 ] Other species that have been sold as "4-leaf clovers" include Marsilea quadrifolia .
These small plants are of unusual appearance and do not resemble common ferns. Common names include water clover and four-leaf clover because of the long-stalked leaves have four clover-like lobes and are either present above water or submerged. It is worth clarifying that these plants are not clovers.
The shamrock carries religious ties, while the four-leaf clover is considered a sign of luck due to its exceeding rarity. In fact, around one out of 10,000 clovers have four leaves.
In fact, UGA clover researchers have discovered that a four-leaf clover occurs due to an uncommon genetic mutation: There must be a unique combination of a recessive gene and environmental factors ...
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The previous record holder, Shigeo Obara, had discovered an 18-leaf clover in 2002, [15] a 21-leaf clover in 2008 [16] and a 56-leaf clover in 2009, [17] also in Japan. A common idiom is "to be (or to live) in clover", meaning to live a carefree life of ease, comfort, or prosperity. [18]
The group is commonly known as the "pepperwort family" or as the "water-clover family" because the leaves of the genus Marsilea superficially resemble the leaves of a four-leaf clover. In all, the family contains three genera and 50 to 80 species with most of those belonging to Marsilea. [1] [2]