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Noun

genus Trapa - small genus of Eurasian aquatic perennial herbs: water chestnut

dicot genus, magnoliopsid genus - genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination

family Trapaceae, Trapaceae - family comprising solely the genus Trapa; in some classifications treated as a subfamily or tribe of the family Onagraceae

water chestnut, water chestnut plant, caltrop - a plant of the genus Trapa bearing spiny four-pronged edible nutlike fruits

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References in periodicals archive

The flowers were initially described as Lythrum tetrasepalum Miki (1959; Kovar-Eder et al., 2002) and proposed as ancestral to the water chesnut genus Trapa by way of a putative intermediate form, the extinct genus Hemitrapa Miki (1959).

Hemitrapa is an extinct genus once distributed in Eurasia and North America and related to, possibly ancestral to, the genus Trapa. A detailed discussion of this genus is presented under Trapa.

Fossil records in the Lythraceae

Since "most of the similarities to the living genus Trapa are common to a large number of only distantly related aquatic angiosperms" (Cook, 1978, cited in Stockey & Rothwell, 1997), determining true relationships of these putative relatives is difficult.

Fossil records in the Lythraceae

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