Cyperus sphacelatus

Rottbøll

Descr. Pl. Rar., 21. 1772.

IntroducedIllustrated
Synonyms: Cyperus balbisii Kunth
Treatment appears in FNA Volume 23. Treatment on page 170. Mentioned on page 171.

Herbs, annual or perennial, cespitose. Culms trigonous, 15–60 cm × 1–3 mm, glabrous. Leaves 2–6, flat to V-shaped, 6–30 (–40) cm × 2–4 mm. Inflorescences: spikes broadly ellipsoid, 5–45 × 10–30 (–45) mm; rays (2–) 5–9, (0.3–) 3–10 cm; rachis 4–17 mm; bracts 5–6, horizontal to ascending, V-shaped, 1.5–30 cm × 0.5–4 mm; rachilla persistent, wings hyaline, 0.4–0.5 mm wide. Spikelets 5–30, pale greenish white or stramineous, compressed, linear-lanceoloid, 7–35 × (1.2–) 1.4–2 mm; floral scales deciduous, 6–34, spreading or appressed, laterally greenish white, often reddish or brown speckled, medially green, laterally 3–5-ribbed, medially 3-ribbed, elliptic, (2.2–) 3–4 (–4.4) × (1.2–) 1.8–2.2 mm, apex acute. Flowers: anthers 0.6 mm; styles 0.6–1.2 mm; stigmas 1–1.4 (–1.7) mm. Achenes reddish-brown to dark-brown, stipitate, narrowly ellipsoid, 1.4–2 × 0.6–0.9 mm, apex apiculate, surfaces puncticulate.


Phenology: Fruiting summer.
Habitat: Disturbed, wet soils
Elevation: 0 m

Distribution

Loading map...
Created with Raphaël 2.2.0
V23 280-distribution-map.jpg

Introduced; Fla., West Indies, Central America, South America, Africa

Discussion

Selected References

None.

Lower Taxa

None.

"shortened" is not a number.

... more about "Cyperus sphacelatus"
reddish-brown +  and dark-brown +
0.14 cm1.4 mm <br />0.0014 m <br /> - 0.2 cm2 mm <br />0.002 m <br /> +
ellipsoid +
0.6mm;0.9mm +
0.6 cm6 mm <br />0.006 m <br /> - ? +
Gordon C. Tucker* +, Brian G. Marcks* +  and J. Richard Carter * +
Rottbøll +
persistent +  and deciduous +
decurrent +
w--shaped +  and keeled +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
1.5 cm15 mm <br />0.015 m <br /> - 30 cm300 mm <br />0.3 m <br /> +
horizontal +  and ascending +
v--shaped +
0.05 cm0.5 mm <br />5.0e-4 m <br /> - 0.4 cm4 mm <br />0.004 m <br /> +
parallel +  and divergent +
terete +, rolled +  and plicate +
15 cm150 mm <br />0.15 m <br /> - 60 cm600 mm <br />0.6 m <br /> +
scabridulous +
trigonous +
1mm;3mm +
Fla. +, West Indies +, Central America +, South America +  and Africa +
3-ribbed +  and 3-5-ribbed +
0.4 cm4 mm <br />0.004 m <br /> - 0.44 cm4.4 mm <br />0.0044 m <br /> +
0.12 cm1.2 mm <br />0.0012 m <br /> - 0.18 cm1.8 mm <br />0.0018 m <br /> +
green +, brown speckled +, reddish +  and greenish white +
0.3 cm3 mm <br />0.003 m <br /> - 0.4 cm4 mm <br />0.004 m <br /> +
appressed +  and spreading +
0.18 cm1.8 mm <br />0.0018 m <br /> - 0.22 cm2.2 mm <br />0.0022 m <br /> +
hypogynous +  and subtending +
biconvex +  and trigonous +
Disturbed, wet soils +
subumbellate +  and capitate +
spreading +  and erect +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
30 cm300 mm <br />0.3 m <br /> - 40 cm400 mm <br />0.4 m <br /> +
6 cm60 mm <br />0.06 m <br /> - ? +  and 30 cm300 mm <br />0.3 m <br /> - ? +
flat +  and v-shaped +
0.2 cm2 mm <br />0.002 m <br /> - 0.4 cm4 mm <br />0.004 m <br /> +
with - 1-3-6 - -30 bristles and/or scales +
Fruiting summer. +
2-3 - -4-carpellate +
antrorse +  and extrorse +
3 - ? +  and 1 - ? +
Descr. Pl. Rar., +
continuous +, articulate +, winged +  and wingless +
conspicuous +
0.3 cm3 mm <br />0.003 m <br /> - 3 cm30 mm <br />0.03 m <br /> +
unequal +
5 +  and 9 +
3 cm30 mm <br />0.03 m <br /> - 10 cm100 mm <br />0.1 m <br /> +
adventitious +
basal +  and proximal +
cylindric;compressed +
cylindric +
Introduced +  and Illustrated +
3 cm30 mm <br />0.03 m <br /> - 4.5 cm45 mm <br />0.045 m <br /> +
0.5 cm5 mm <br />0.005 m <br /> - 4.5 cm45 mm <br />0.045 m <br /> +
ellipsoid +
1 cm10 mm <br />0.01 m <br /> - 3 cm30 mm <br />0.03 m <br /> +
0.12 cm1.2 mm <br />0.0012 m <br /> - 0.14 cm1.4 mm <br />0.0014 m <br /> +
stramineous +, white +  and pale greenish +
0.7 cm7 mm <br />0.007 m <br /> - 3.5 cm35 mm <br />0.035 m <br /> +
5 +  and 30 +
linear-lanceoloid;compressed +
1.4mm;2mm +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
0.14 cm1.4 mm <br />0.0014 m <br /> - 0.17 cm1.7 mm <br />0.0017 m <br /> +
papillate +
0.1 cm1 mm <br />0.001 m <br /> - 0.14 cm1.4 mm <br />0.0014 m <br /> +
2-3-fid +
0.06 cm0.6 mm <br />6.0e-4 m <br /> - 0.12 cm1.2 mm <br />0.0012 m <br /> +
Cyperus balbisii +
Cyperus sphacelatus +
Cyperus subg. Cyperus +
species +
tuberous +, stoloniferous +  and rhizomatous +
perennial +  and annual +
herb +  and cespitose +
0.4mm +  and 0.5mm +