familyCyperaceae
genusCyperus
subgenusCyperus subg. Juncellus
speciesCyperus serotinus

Cyperus serotinus

Rottbøll

Descr. Pl. Rar., 18. 1772.

Gordon C. Tucker*, Brian G. Marcks*, J. Richard Carter *
Common names: Tidalmarsh flatsedge
IntroducedIllustrated
Synonyms: Chlorocyperus serotinus (Rottbøll) Palla Juncellus serotinus (Rottbøll) C. B. Clarke
Treatment appears in FNA Volume 23. Treatment on page 164. Mentioned on page 142, 162.
Please click on the illustration for a higher resolution version.
Illustrator: Yevonn Wilson-Ramsey

Copyright: Flora of North America Association

Herbs, perennial, stoloniferous; stolons terminated by tubers. Culms trigonous, 50–100 cm × 5–8 mm, glabrous. Leaves 3–6, V-shaped, 20–50 cm × 5–8 (–10) mm. Inflorescences: spikes not appearing lateral, rays 5–8, 2–7 (–12) cm; bracts 3–4, ± horizontal to ascending at 45°, V-shaped, 5–25 cm × 1.5–8 mm; spikes 1–4, ovoid, 2–4 × 2–3 cm; rachis 1–2.7 cm, smooth or hispidulous; rachilla persistent, wingless or with hyaline wings scarcely 0.1 mm wide. Spikelets 7–14, flattened, lanceoloid, 10–20 × 2–2.5 mm; floral scales 10–30, laterally dark-brown to reddish-brown, medially greenish, laterally 5–9-ribbed, ovate-deltate; anthers 3, 0.5 mm; styles 0.5 mm; stigmas 1.2–1.6 mm. Achenes brown, sessile, ellipsoid, 1.4–1.6 × 1.4–1.5 mm, apex obtuse, apiculate.


Phenology: Fruiting summer.
Habitat: Tidal marshes
Elevation: 0 m

Distribution

V23 263-distribution-map.jpg

Introduced; Del., N.J., Pa., Eurasia

Discussion

Selected References

None.

Lower Taxa

None.

"shortened" is not a number.

... more about "Cyperus serotinus"
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Achene architecture
sessile +
Achene coloration
brown +
Achene length
0.14 cm1.4 mm <br />0.0014 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
Achene shape
ellipsoid +
Achene width
1.4mm;1.5mm +
Anther fixation
basifixed +
Anther some measurement
0.5 cm5 mm <br />0.005 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Apex architecture or shape
apiculate +
Apex shape
obtuse +
Author
Gordon C. Tucker* +, Brian G. Marcks* +  and J. Richard Carter * +
Authority
Rottbøll +
Base duration
persistent +  and deciduous +
Base shape
decurrent +
Basionyms
Cyperus sect. Juncellus +
Blade presence
absent +
Blade prominence or shape
flat +
Blade shape
w--shaped +  and keeled +
Bract architecture
glumaceous +  and foliaceous +
Bract arrangement
2-ranked +  and arranged +
Bract length
5 cm50 mm <br />0.05 m <br /> (25 cm250 mm <br />0.25 m <br />) +
Bract orientation
less horizontal +  and ascending +
Bract quantity
3;4 +
Bract shape
v--shaped +
Bract width
0.15 cm1.5 mm <br />0.0015 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Branch atypical quantity
3 (4) +
Branch quantity
2;3 +
Bristle atypical quantity
6;30 +
Bristle quantity
3;6 +
Cauline leaf architecture or shape
folded +
Cauline leaf arrangement
parallel +  and divergent +
Cauline leaf arrangement or course or shape
linear +
Cauline leaf orientation
Ascending (?) +
Cauline leaf prominence or shape
flat +
Cauline leaf shape
terete +, rolled +  and plicate +
Common name
Tidalmarsh flatsedge +
Culm architecture or arrangement or growth form
not +  and solitary +
Culm length
50 cm500 mm <br />0.5 m <br /> (100 cm1,000 mm <br />1 m <br />) +
Culm pubescence
glabrous +
Culm relief
scabridulous +
Culm shape
trigonous +
Culm width
5mm;8mm +
Distal scale architecture
empty +
Distribution
Del. +, N.J. +, Pa. +  and Eurasia +
Elevation
0 m +
Embryo position
basal +
Endosperm quantity
abundant +
Floral scale architecture or shape
5-9-ribbed +
Floral scale arrangement
distichous +
Floral scale coloration
greenish +, laterally dark-brown +  and reddish-brown +
Floral scale duration
deciduous +
Floral scale quantity
10 (30) +
Floral scale shape
ovate-deltate +
Flower position
hypogynous +  and subtending +
Flower quantity
single +
Flower reproduction
bisexual +
Fruits achene shape
biconvex +  and trigonous +
Habitat
Tidal marshes +
Illustration
Present +
Illustration copyright
Flora of North America Association +
Illustrator
Yevonn Wilson-Ramsey +
Inflorescence architecture
subumbellate +  and capitate +
Inflorescence position
pseudolateral +
Inflorescence position or structure subtype
terminal +
Inflorescences panicle architecture
pseudoumbel +
Inflorescences panicle development
modified +
Introduced
true +
Involucral-bract architecture or shape
leaflike +
Involucral-bract arrangement
arranged +
Involucral-bract orientation
spreading +  and erect +
Involucral-bract quantity
1;22 +
Leaf arrangement
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
Leaf atypical width
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Leaf length
20 cm200 mm <br />0.2 m <br /> (?) +  and 50 cm500 mm <br />0.5 m <br /> (?) +
Leaf position
basal +
Leaf quantity
3 (6) +
Leaf shape
v--shaped +
Leaf width
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Ligule presence
absent +
Locule quantity
1 +
Margin fusion
fused +
Number of lower taxa
0 +
Perianth life cycle
falling +
Perianth presence
absent +
Perianth quantity
with (1-)3-6(-30) bristles and/or scales +
Pericarp width
thin +
Phenology
Fruiting summer. +
Pistil architecture
2-3(-4)-carpellate +
Pistil fusion
fused +
Pistil quantity
2 +
Prickle orientation
antrorse +  and extrorse +
Prophyll architecture
pistillate +
Prophyll atypical quantity
0 (3) +
Prophyll position
subtending +
Prophyll quantity
3 (?) +  and 1 (?) +
Publication title
Descr. Pl. Rar., +
Publication year
1772 +
Rachillum architecture
with hyaline wings +  and wingless +
Rachillum duration
persistent +
Rachis pubescence
hispidulous +  and smooth +
Rachis some measurement
1cm;2.7cm +
Ray arrangement
singly +
Ray length
unequal +
Ray position
lateral +
Reference
None +
Root derivation
adventitious +
Root texture
fibrous +
Scale architecture
empty +
Scale arrangement
distichous +
Scale atypical quantity
6 (30) +
Scale position
basal +  and proximal +
Scale quantity
0;76 +
Scale reproduction
fertile +
Scale shape
cylindric;compressed +
Seed quantity
1 +
Sheath shape
cylindric +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V23/V23 263.xml +
Special status
Introduced +  and Illustrated +
Spike atypical some measurement
7 cm70 mm <br />0.07 m <br /> (12 cm120 mm <br />0.12 m <br />) +
Spike length
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Spike quantity
1;4 +
Spike shape
ovoid +
Spike some measurement
2 cm20 mm <br />0.02 m <br /> (7 cm70 mm <br />0.07 m <br />) +
Spike width
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Spikelet architecture
spicate +
Spikelet architecture or arrangement or growth form
solitary +
Spikelet arrangement
arranged +
Spikelet length
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Spikelet quantity
7 +  and 14 +
Spikelet shape
lanceoloid;flattened +
Spikelet width
2mm;2.5mm +
Stamen atypical quantity
1 (3) +
Stamen fusion
distinct +
Stamen quantity
3 +  and 2 +
Stem architecture
septate +, hollow +  and solid +
Stem shape
compressed +, terete +  and trigonous +
Stigma quantity
2 +
Stigma relief
papillate +
Stigma some measurement
0.12 cm1.2 mm <br />0.0012 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
Style architecture or shape
undivided +
Style arrangement or course or shape
linear +
Style shape
2-3-fid +
Style some measurement
0.5 cm5 mm <br />0.005 m <br /> (?) +
Synonyms
Chlorocyperus serotinus +  and Juncellus serotinus +
Taxon family
Cyperaceae +
Taxon name
Cyperus serotinus +
Taxon parent
Cyperus subg. Juncellus +
Taxon rank
species +
Testa fusion
free +
Testa width
thin +
Volume
Volume 23 +
Whole organism architecture
stoloniferous +
Whole organism duration
perennial +
Whole organism growth form
herb +
Wing coloration
hyaline +
Wing width
0.1 +
X chromosome quantity
5;100 +