Cyperus filiformis

Swartz

Prodr., 20. 1788.

Illustrated
Synonyms: Cyperus floridanus Britton ex Small Mariscus filiforme (Swartz) Roemer & Schultes Mariscus floridensis C. B. Clarke Torulinium filiforme (Swartz) C. B. Clarke
Treatment appears in FNA Volume 23. Mentioned on page 178.

Herbs, perennial. Culms trigonous, 20–36 cm × 0.5–1 mm. Leaves flat, 4–22 cm × 1–2 mm. Inflorescence a single loose cluster of spikelets; rays 0– (1–2), if present, to 4 cm; bracts 2–3, ascending, 1–8 cm × 0.7–1 mm; rachilla with wings 0.6 mm wide. Spikelets 2–8, linear, terete, 6–20 × 0.7–1 mm; floral scales 6–10, medially green, laterally brown, medially faintly 3-ribbed, laterally faintly 3–5-ribbed, ovate, 2.5–3 × 2 mm. Flowers: anthers 1 mm; styles 0.5 mm; stigmas 1 mm. Achenes black, sessile, obovoid, 2 × 0.8 mm, apex scarcely apiculate, surfaces puncticulate.


Phenology: Fruiting spring–fall.
Habitat: Damp, disturbed places
Elevation: 0–20 m

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Cyperus filiformis"
2 cm20 mm <br />0.02 m <br /> (?) +
1 cm10 mm <br />0.01 m <br /> (?) +
Gordon C. Tucker* +, Brian G. Marcks* +  and J. Richard Carter * +
Swartz +
shortened +
persistent +  and deciduous +
decurrent +
Undefined subg. Diclidium +
w--shaped +  and keeled +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
1 cm10 mm <br />0.01 m <br /> (8 cm80 mm <br />0.08 m <br />) +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
parallel +  and divergent +
terete +, rolled +  and plicate +
20 cm200 mm <br />0.2 m <br /> (36 cm360 mm <br />0.36 m <br />) +
scabridulous +
trigonous +
0.5mm;1mm +
Fla. +  and West Indies +
0–20 m +
3-5-ribbed +  and 3-ribbed +
brown +  and green +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
2 cm20 mm <br />0.02 m <br /> (?) +
hypogynous +  and subtending +
biconvex +  and trigonous +
Damp, disturbed places +
subumbellate +  and capitate +
spreading +  and erect +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
4cm +  and 22cm +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
with (1-)3-6(-30) bristles and/or scales +
Fruiting spring–fall. +
2-3(-4)-carpellate +
antrorse +  and extrorse +
3 (?) +  and 1 (?) +
unequal +
0 cm0 mm <br />0 m <br /> (4 cm40 mm <br />0.04 m <br />) +
adventitious +
basal +  and proximal +
cylindric;compressed +
cylindric +
Illustrated +
ovoid;cylindric +
0.6 cm6 mm <br />0.006 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.7mm;1mm +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
1 cm10 mm <br />0.01 m <br /> (?) +
2-3-fid +
0.5 cm5 mm <br />0.005 m <br /> (?) +
Cyperus floridanus +, Mariscus filiforme +, Mariscus floridensis +  and Torulinium filiforme +
Cyperus filiformis +
Cyperus subg. Diclidium +
species +
tuberous +, stoloniferous +  and rhizomatous +