Rhynchospora kunthii

Nees ex Kunth

Enum. Pl. 2: 296. 1837.

Illustrated
Synonyms: Rhynchospora schaffneri Boeckeler
Treatment appears in FNA Volume 23. Treatment on page 225. Mentioned on page 205, 224.
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Plants solitary or in small tufts, (5–) 10–70 cm, clonal; rhizomes strongly present, stoloniferous. Culms leafiest toward base, ± trigonous, slender. Leaves: basal leaves spreadingascending, distal more erect, mostly exceeded by culms (except in highaltitude forms); blades proximally flat or strongly folded, 1.5–4 mm wide, apex trigonous, subulate. Inflorescences: spikelet clusters (2–) 3–5, compact, proximalmost widely spaced, turbinate to ovoid; peduncles ascending; branches ascending to spreading; leaf bracts exceeding proximalmost clusters, exceeded by distal cluster. Spikelets deep redbrown to nearly black, ovoid, 3–4 mm, apex acute; fertile scales ovate, 2.5–3 mm, apex acute, midrib included or shortexcurrent. Flowers: perianth bristles 6, some short, some extending to or nearly to tubercle base, antrorsely barbellate. Fruits 2–3 per spikelet, 2–2.1 mm; body pale yellowbrown, lenticular, broadly ellipsoidobovoid, 1.3–1.6 × 1–1.2 mm; surfaces transversely irregularly rugulose, intervals with rows of vertical, narrowly rectangular alveolae; tubercle evenly or concavely triangular, 0.5–0.6 (–0.7) mm.


Phenology: Fruiting late spring–summer.
Habitat: Marsh meadows, seeps, boggy sites
Elevation: 1000–3500 m

Distribution

V23 396-distribution-map.jpg

Calif., Mexico, South America (Colombia)

Discussion

Selected References

None.

Lower Taxa

None.

"shortened" is not a number."wider" is not a number.

... more about "Rhynchospora kunthii"
rectangular +
acute;acute;subulate;trigonous +
Robert Kral +
Nees ex Kunth +
2-lobed +  and lunate +
scabridulous +  and scabrid +
folded +  and flat +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
pale yellowbrown +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
warty +, papillate +, alveolate +  and pitted +
lenticular +
0.1 cm1 mm <br />0.001 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
ascending +  and spreading +
parallel +  and divergent +
terete +, rolled +  and plicate +
trigonous +
slender +
Calif. +, Mexico +  and South America (Colombia) +
1000–3500 m +
distalmost +
0.2 cm2 mm <br />0.002 m <br /> (0.21 cm2.1 mm <br />0.0021 m <br />) +
biconvex +  and trigonous +
Marsh meadows, seeps, boggy sites +
racemose +, corymbose +  and paniculate +
erect +, rarely +  and spreading +
3-ranked +  and polystichous +
cauline +  and basal +
keeled;terete;keeled;terete +
revolute +  and involute +
shortexcurrent +  and included +
decurrent +
plumed +  and barbed +
deciduous +  and persistent +
shorter or longer +
of 2-12(-20) bristles +
Fruiting late spring–summer. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
stoloniferous +
adventitious +
basal +  and proximal +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
cylindric +
Illustrated +
redbrown +  and nearly black +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
2 +  and 3 +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
cleft +, 2-fid +  and undivided +
Rhynchospora schaffneri +
Rhynchospora kunthii +
Rhynchospora +
species +
sulcate +  and 2-edged +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
triangular +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
5 cm50 mm <br />0.05 m <br /> (10 cm100 mm <br />0.1 m <br />) +
perennial +  and annual +
plant +  and clonal +