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Xyris brevifolia

Xyris brevifolia Michx.  
Family: Xyridaceae
Short-Leaf Yellow-Eyed-Grass
Xyris brevifolia image
  • FNA
  • Resources
Robert Kral in Flora of North America (vol. 22)
Herbs, annual, cespitose, rarely solitary, (4--)10--30(--60) cm. Stems compact. Leaves in fans, 2--10(--15) cm; sheath base greenish to pink; blade green or red-tinged, filiform to linear, 1--4 mm wide, smooth, margins smooth to papillate. Inflorescences: scape sheaths mostly exceeding leaves, blade prominent (in filiform-leaved extremes, overtopped by leaves); scapes wiry, nearly terete, 0.5--1 mm wide, low-ribbed apically; spikes oblate to globose or ovoid, mostly as broad as long, 5--7(--10) mm, apex blunt; fertile bracts 3--6 mm, margins often squarrose, lacerate, scarious, with red inner band, apex broadly rounded. Flowers: lateral sepals included, slightly curved, 3--5 mm, keel firm, nearly entire to papillate or ciliolate, apex reddish; petals unfolding in morning, blade obovate, 2.5--3 mm; staminodes bearded. Seeds amber, broadly ellipsoid, 0.5 mm, finely lined. 2n = 18.

Flowering spring--summer(--winter in the south). Acid, sandy, moist savanna and cleared areas; 0--200 m; Ala., Fla., Ga., N.C., S.C.; West Indies; South America (Brazil).

Plants in south Florida and Cuba often have longer and narrower leaf blades than is typical, and G. O. K. Malme (1925) named Cuban material Xyris intermedia on the basis of longer, narrower leaf blades and entire sepal keels. In Florida, however, all of these characters intergrade. The red sepal tips, almost a homology with the bract dorsal area, are a constant (yet neglected) character. This species is often weedy.

Xyris brevifolia
Open Interactive Map
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University of Florida Herbarium
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University of Florida Herbarium
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University of Florida Herbarium
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University of Florida Herbarium
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University of Florida Herbarium
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University of Florida Herbarium
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University of Florida Herbarium
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Genevieve J Kline
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University of Florida Herbarium
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University of Florida Herbarium
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University of Florida Herbarium
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University of Florida Herbarium
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University of Florida Herbarium
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