Synonyms: Centauria calcitrapa, caltrop, star-thistle
Definition: Mediterranean annual or biennial herb having pinkish to purple flowers surrounded by spine-tipped scales; naturalized in America
Similar words: centaury
Definition: any plant of the genus Centaurea
Synonyms: caltrop, water chestnut, water chestnut plant
Definition: a plant of the genus Trapa bearing spiny four-pronged edible nutlike fruits
Similar words: water plant, hydrophyte, hydrophytic plant, aquatic plant
Definition: a plant that grows partly or wholly in water whether rooted in the mud, as a lotus, or floating without anchorage, as the water hyacinth
Synonyms: Tribulus terestris, caltrop, devil's weed
Definition: tropical annual procumbent poisonous subshrub having fruit that splits into five spiny nutlets; serious pasture weed