Cyperus cuspidatus

Kunth in A. von Humboldt et al.

in A. von Humboldt et al., Nov. Gen. Sp. 1: 204. 1816.

Illustrated
Treatment appears in FNA Volume 23. Treatment on page 158. Mentioned on page 143, 156.

Herbs, annual, cespitose. Culms 1–6 (–25), trigonous to roundly trigonous, (0.5–) 2–5 (–9) cm × 0.2–0.4– (0.6) mm, glabrous. Leaves 1–6, V-shaped, 1–6 cm × 0.3–1 mm. Inflorescences: heads digitate, loosely ovoid, 3–18 × 3–26 mm; rays (0–) 1–6 (–8), 2.5–20 (–30) mm; bracts 2–3 (–5), horizontal to ascending at 45 (–60) °, V-shaped, 2–60 × 0.3–1.2 mm. Spikelets (3–) 10–20 (–30), greenish to reddish-brown, narrowly ellipsoid to oblong, 3–11 × (0.8–) 1.2–1.5 mm; floral scales (3–) 6–20 (–28), laterally greenish to reddish-brown, glossy, medially greenish to light reddish-brown, strongly recurved, laterally ribless, medially strongly 3-ribbed, oblongovate, (0.8–) 1–1.3 × 0.8–1 (–1.2) mm, apex emarginate, cusp 0.6–1.2 mm. Flowers: stamens 2 or 3; anthers oblong-ovoid, 0.1 (–0.2) mm; styles (0.2–) 0.4–0.6 mm; stigmas 0.3–0.5 mm. Achenes brown, oblong-obovoid, (0.5–) 0.6 × (0.3–) 0.4 mm, base cuneate, apex blunt, surfaces coarsely papillose.


Phenology: Fruiting summer.
Habitat: Damp, disturbed soils
Elevation: 0–300 m

Distribution

V23 248-distribution-map.jpg

Ala., Fla., Ga., S.C., Mexico, Central America, South America

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Cyperus cuspidatus"
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (?) +
oblong-obovoid +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.02 cm0.2 mm <br />2.0e-4 m <br />) +
oblong-ovoid +
0.1 cm1 mm <br />0.001 m <br /> (?) +
Gordon C. Tucker* +, Brian G. Marcks* +  and J. Richard Carter * +
Kunth in A. von Humboldt et al. +
shortened +
persistent +  and deciduous +
cuneate +
w--shaped +  and keeled +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
0.2 cm2 mm <br />0.002 m <br /> (6 cm60 mm <br />0.06 m <br />) +
horizontal +  and ascending +
v--shaped +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
parallel +  and divergent +
terete +, rolled +  and plicate +
5 cm50 mm <br />0.05 m <br /> (9 cm90 mm <br />0.09 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (?) +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
scabridulous +
trigonous +  and roundly trigonous +
0.2mm;0.4mm +
Ala. +, Fla. +, Ga. +, S.C. +, Mexico +, Central America +  and South America +
0–300 m +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
medially greenish +  and light reddish-brown +
0.1 cm1 mm <br />0.001 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
folded +  and 2-keeled +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
hypogynous +  and subtending +
biconvex +  and trigonous +
Damp, disturbed soils +
0.3 cm3 mm <br />0.003 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (2.6 cm26 mm <br />0.026 m <br />) +
subumbellate +  and capitate +
spreading +  and erect +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
1cm +  and 6cm +
v--shaped +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
with (1-)3-6(-30) bristles and/or scales +
Fruiting summer. +
2-3(-4)-carpellate +
antrorse +  and extrorse +
3 (?) +  and 1 (?) +
in A. von Humboldt et al., Nov. Gen. Sp. +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
unequal +
1 +  and 6 +
0.25 cm2.5 mm <br />0.0025 m <br /> (2 cm20 mm <br />0.02 m <br />) +
adventitious +
basal +  and proximal +
cylindric;compressed +
cylindric +
Illustrated +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
greenish +  and reddish-brown +
0.3 cm3 mm <br />0.003 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
10 +  and 20 +
narrowly ellipsoid;oblong +
1.2mm;1.5mm +
3 (?) +  and 2 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
2-3-fid +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
papillose +
Cyperus subg. Protocyperus +
Cyperus cuspidatus +
Cyperus subg. Pycnostachys +
species +
tuberous +, stoloniferous +  and rhizomatous +
herb +  and cespitose +