Definitions for xyridaceae
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Xyridaceae, family Xyridaceae, yellow-eyed grass family(noun)
plants of tropical to temperate regions; usually in wet places
The Xyridaceae are a family of flowering plants. The botanical name has been recognized by many taxonomists and is known as the yellow-eyed grass gamily. The APG II system, of 2003, also recognizes this family, and assigns it to the order Poales in the clade commelinids, in the monocots. This treatment in APG II represents a slight change from the APG system of 1998, which had recognized the family Abolbodaceae for some of the plants included here; that family was unplaced as to order, but was assigned to this same clade. The family contains almost 300 species in five genera, but most of the species are found in the genus Xyris. The species are mostly tropical and subtropical. The Cronquist system of 1981 also recognized such a family and placed it in the order Commelinales in the subclass Commelinidae in class Liliopsida in division Magnoliophyta. The Wettstein system, last updated in 1935, placed the family in order Enantioblastae. Xyris torta or twisted yellow-eyed Grass is on Minnesota's endangered species list.
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