Xyris laxifolia
Xyris isoetifolia
laxleaf yelloweyed grass
quillwort yelloweyed grass
compact.
erect or ascending, 4–15 cm;
sheaths glossy brown or red-brown, chaffy;
blade green, filiform or narrowly linear, twisted, to 1 mm wide, smooth.
scape sheaths exceeded by leaves;
scapes linear, nearly terete, 0.5(–0.7) mm wide, smooth, not ribbed;
spikes ellipsoid to obovoid, 5–7(–10) mm;
fertile bracts ca. 4.5 mm, margins nearly entire, apex rounded.
lateral sepals included, reddish brown, linear-curvate, 4 mm, keel firm, ciliate;
petals unfolding in morning, blade obovate, 4 mm;
staminodes bearded.
translucent, ellipsoid, 0.5 mm, distinctly longitudinally ribbed, with fainter transverse lines.
= 18.
Xyris laxifolia
Xyris isoetifolia
Varieties 2 (1 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Xyris isoetifolia, locally abundant only in northwest Florida, is most often mistaken for X. baldwiniana but is distinguishable by its bearded staminodes and more distinctly ribbed, shorter seeds.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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