Rhynchospora knieskernii
knieskern's beaksedge
erect to arching, leafy, linear to filiform, nearly triangular.
ascending, overtopped by culm;
blades flat, linear to filiform, to 1.8 mm wide, apex distally involute, trigonous, setaceous.
terminal and axillary, spikelet clusters 2–4, widely spaced, the lowest near plant base;
clusters compact, broadly turbinate to hemispheric, to 1.5 cm wide; leafy bracts curved, setaceous, slightly to greatly overtopping subtended compounds.
dark brown, lance-ellipsoid, 2–3 mm;
fertile scales 2 mm, apex acute, midrib short-excurrent or not.
perianth bristles 6, ± as long as fruit body, retrorsely barbellate.
mostly 2 per spikelet, 1.5–1.9 mm;
body brown with yellowish center, ellipsoid, lenticular distal to short stipe, 1–1.3 × 0.6–0.8 mm;
tubercle triangular, 0.3–0.6 mm, distinctly shorter than fruit body.
Rhynchospora knieskernii
Of conservation concern.
Rhynchospora knieskernii is in the Center for Plant Conservation’s National Collection of Endangered Plants.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
WildflowerSearch
iNaturalist
USDA Plants Database
