familyCyperaceae
genusCyperus
subgenusCyperus subg. Cyperus
speciesCyperus sphaerolepis

Cyperus sphaerolepis

Boeckeler

Linnaea 35: 609. 1868.

Gordon C. Tucker*, Brian G. Marcks*, J. Richard Carter *
Common names: Rusby’s sedge
Illustrated
Synonyms: Cyperus fendlerianus var. debilis (Britton) Kükenthal Cyperus fendlerianus var. leucolepis (Boeckeler) Kükenthal Cyperus leucolepis Britton Cyperus rusbyi Torrey Cyperus schweinitzii var. debilis Britton
Treatment appears in FNA Volume 23. Treatment on page 177. Mentioned on page 144, 147, 176.
Please click on the illustration for a higher resolution version.
Illustrator: Yevonn Wilson-Ramsey

Copyright: Flora of North America Association

Herbs, perennial, rhizomatous. Culms basally cormlike, trigonous, (8–) 15–40 (–60) cm × (0.4–) 0.8–1.5 (–2) mm, glabrous or sparsely to densely scabridulous to minutely scabrid on angles or usually on surface, just proximal to bracts or over distal few centimeters. Leaves (1–) 3–4, V-shaped, (7–) 15–25 (–40) cm × 1–3 (–5) mm, sparsely minutely scabridulous on margins and keel in distal 1/3, otherwise glabrous. Inflorescences: spikes 1–3, sessile (occasionally 1 spike on peduncle 5–20 cm, produced from axil of distalmost leaf), loosely cylindric to oblong-ovoid, (9–) 15–30 (–45) × (3–) 8–15 (–18) mm; bracts 2–3 (–7), longest erect, or very nearly so, others spreading, (1–) 3–20 (–26) cm × (0.5–) 1–3 (–5) mm; rays (1–) 2–6 (–11), (1–) 2–7 (–12) cm, in some depauperate plants rays less than 1 cm; rachilla ± deciduous, wingless. Spikelets (4–) 8–25 (–35), oblongellipsoid to linear, compressed-quadrangular, (2–) 7–11 (–15) × (2–) 2.4–3.2 (–3.5) mm; floral scales (1–) 4–8 (–14), laterally dull whitish, stramineous, or light-brown, or reddish-brown to deep red, often red-dotted especially near keel, medially greenish, broadly ovate-deltate to ± orbiculate, laterally strongly 3 (–4) -ribbed, medially weakly 1–3-ribbed, (1.6–) 1.8–2.4 × (1.8–) 2.2–2.8 mm, margins clear, erose especially apically, apex obtuse, tipped with straight mucro 0.1–0.2 (–0.3) mm. Flowers: anthers 0.4–0.6 mm; styles 0.4 (–0.8) mm; stigmas 0.6–1 mm. Achenes finely reticulate with isodiametric cells, this layer gradually wearing away to reveal inner brown to reddish-brown layer, stipitate, ovoid to obovoid, 1.4–1.6 (–1.9) × 1–1.3 (–1.4) mm, base cuneate to ± attenuate, stipe 0.1–0.2 × 0.2 mm, apex obtuse, slightly apiculate, inner layer papillose.


Phenology: Fruiting summer.
Habitat: Clearings in montane forests
Elevation: 1000–2500 m

Distribution

V23 298-distribution-map.jpg

Ariz., N.Mex., Tex., Mexico

Discussion

Cyperus sphaerolepis has long been known by the synonym C. rusbyi and has been treated as a variety of C. fendlerianus. Specific status for C. sphaerolepis is supported by B. G. Marcks (1972) and G. C. Tucker (1994).

Selected References

None.

Lower Taxa

None.

"shortened" is not a number."longest" is not a number.

... more about "Cyperus sphaerolepis"
RDF feed
Achene architecture or coloration or relief
reticulate +
Achene life cycle
mature +
Achene shape
flattened;trigonous +
Anther fixation
basifixed +
Anther some measurement
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
Apex architecture
tipped +
Apex architecture or shape
apiculate +
Apex shape
obtuse;obtuse +
Author
Gordon C. Tucker* +, Brian G. Marcks* +  and J. Richard Carter * +
Authority
Boeckeler +
Base duration
persistent +  and deciduous +
Base shape
cuneate +  and more or less attenuate +
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 atypical quantity
3 (7) +
Bract orientation
erect +
Bract quantity
2;3 +
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 +
Cell architecture or shape
isodiametric +
Common name
Rusby’s sedge +
Culm architecture or arrangement or growth form
not +  and solitary +
Culm architecture or shape
cormlike +
Culm atypical length
40 cm400 mm <br />0.4 m <br /> (60 cm600 mm <br />0.6 m <br />) +
Culm atypical width
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Culm length
15 cm150 mm <br />0.15 m <br /> (40 cm400 mm <br />0.4 m <br />) +
Culm position
proximal +
Culm pubescence
sparsely to densely +  and glabrous +
Culm quantity
Few (?) +
Culm relief
scabridulous +  and minutely scabrid +
Culm shape
trigonous +
Culm width
0.8mm;1.5mm +
Distal scale architecture
empty +
Distribution
Ariz. +, N.Mex. +, Tex. +  and Mexico +
Elevation
1000–2500 m +
Embryo position
basal +
Endosperm quantity
abundant +
Floral scale architecture or shape
1-3-ribbed +  and 3(-4)-ribbed +
Floral scale arrangement
distichous +
Floral scale atypical length
0.16 cm1.6 mm <br />0.0016 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
Floral scale atypical quantity
8 (14) +
Floral scale atypical width
0.18 cm1.8 mm <br />0.0018 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
Floral scale coloration
greenish +, red-dotted +, light-brown or reddish-brown +  and deep red +
Floral scale duration
deciduous +  and persistent +
Floral scale length
0.18 cm1.8 mm <br />0.0018 m <br /> (0.24 cm2.4 mm <br />0.0024 m <br />) +
Floral scale quantity
4 (8) +
Floral scale shape
broadly ovate-deltate +  and more or less orbiculate +
Floral scale width
0.22 cm2.2 mm <br />0.0022 m <br /> (0.28 cm2.8 mm <br />0.0028 m <br />) +
Flower position
hypogynous +  and subtending +
Flower quantity
single +
Flower reproduction
bisexual +
Fruits achene shape
biconvex +  and trigonous +
Habitat
Clearings in montane forests +
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 +
Inner layer relief
papillose +
Involucral-bract architecture or shape
leaflike +
Involucral-bract arrangement
arranged +
Involucral-bract orientation
spreading +  and erect +
Involucral-bract quantity
1;22 +
Layer architecture
stipitate +
Layer atypical length
0.16 cm1.6 mm <br />0.0016 m <br /> (0.19 cm1.9 mm <br />0.0019 m <br />) +
Layer atypical width
0.13 cm1.3 mm <br />0.0013 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
Layer coloration
reddish-brown +, brown +  and inner +
Layer length
0.14 cm1.4 mm <br />0.0014 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
Layer shape
Ovoid (Obovoid) +
Layer width
1mm;1.3mm +
Leaf arrangement
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
Leaf atypical length
25 cm250 mm <br />0.25 m <br /> (40 cm400 mm <br />0.4 m <br />) +
Leaf atypical quantity
1 (3) +
Leaf atypical width
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Leaf length
15 cm150 mm <br />0.15 m <br /> (?) +  and 25 cm250 mm <br />0.25 m <br /> (?) +
Leaf position
basal +
Leaf pubescence
glabrous +
Leaf quantity
3 (4) +
Leaf relief
scabridulous +
Leaf shape
v--shaped +
Leaf width
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Ligule presence
absent +
Locule quantity
1 +
Margin architecture or relief
erose +
Margin coloration
clear +
Margin fusion
fused +
Mucro atypical some measurement
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
Mucro course
straight +
Mucro some measurement
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.02 cm0.2 mm <br />2.0e-4 m <br />) +
Number of lower taxa
0 +
Other atypical length
20 cm200 mm <br />0.2 m <br /> (26 cm260 mm <br />0.26 m <br />) +
Other atypical width
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Other length
3 cm30 mm <br />0.03 m <br /> (20 cm200 mm <br />0.2 m <br />) +
Other orientation
spreading +
Other width
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
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
1 +
Plants ray condition
depauperate +
Plants ray some measurement
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Prickle orientation
antrorse +  and extrorse +
Prophyll architecture
pistillate +
Prophyll atypical quantity
0 (3) +
Prophyll position
subtending +
Prophyll quantity
3 (?) +  and 1 (?) +
Publication title
Linnaea +
Publication year
1868 +
Rachillum architecture
wingless +
Rachillum duration
deciduous +
Rachillum life cycle
falling +
Rachis prominence
conspicuous +
Ray arrangement
singly +
Ray atypical quantity
6 (11) +
Ray atypical some measurement
7 cm70 mm <br />0.07 m <br /> (12 cm120 mm <br />0.12 m <br />) +
Ray length
unequal +
Ray quantity
2 +  and 6 +
Ray some measurement
2 cm20 mm <br />0.02 m <br /> (7 cm70 mm <br />0.07 m <br />) +
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 298.xml +
Special status
Illustrated +
Spike architecture
sessile +
Spike architecture or fragility
loose +
Spike atypical length
3 cm30 mm <br />0.03 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
Spike atypical width
1.5 cm15 mm <br />0.015 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
Spike density
dense +
Spike length
1.5 cm15 mm <br />0.015 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Spike quantity
1;3 +
Spike shape
loosely cylindric;oblong-ovoid +
Spike width
0.8 cm8 mm <br />0.008 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Spikelet architecture
spicate +
Spikelet architecture or arrangement or growth form
solitary +
Spikelet arrangement
arranged +
Spikelet arrangement or course or shape
linear +
Spikelet atypical length
1.1 cm11 mm <br />0.011 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Spikelet atypical quantity
25 (35) +
Spikelet atypical width
0.32 cm3.2 mm <br />0.0032 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
Spikelet length
0.7 cm7 mm <br />0.007 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
Spikelet life cycle
falling +
Spikelet quantity
8 +  and 25 +
Spikelet shape
compressed-quadrangular +
Spikelet width
2.4mm;3.2mm +
Stamen atypical quantity
1 (3) +
Stamen fusion
distinct +
Stamen quantity
3 +
Stem architecture
septate +, hollow +  and solid +
Stem shape
compressed +, terete +  and trigonous +
Stigma quantity
3 +
Stigma relief
papillate +
Stigma some measurement
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Stipe length
0.01 cm0.1 mm <br />1.0e-4 m <br /> (?) +  and 0.02 cm0.2 mm <br />2.0e-4 m <br /> (?) +
Stipe width
0.2 cm2 mm <br />0.002 m <br /> (?) +
Style architecture or shape
undivided +
Style arrangement or course or shape
linear +
Style atypical some measurement
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
Style shape
2-3-fid +
Style some measurement
0.4 cm4 mm <br />0.004 m <br /> (?) +
Synonyms
Cyperus fendlerianus var. debilis +, Cyperus fendlerianus var. leucolepis +, Cyperus leucolepis +, Cyperus rusbyi +  and Cyperus schweinitzii var. debilis +
Taxon family
Cyperaceae +
Taxon name
Cyperus sphaerolepis +
Taxon parent
Cyperus subg. Cyperus +
Taxon rank
species +
Testa fusion
free +
Testa width
thin +
Volume
Volume 23 +
Whole organism architecture
rhizomatous +
Whole organism duration
perennial +
Whole organism growth form
herb +
Wing coloration
hyaline +
X chromosome quantity
5;100 +