familyCyperaceae
genusCyperus
subgenusCyperus subg. Cyperus
speciesCyperus esculentus
varietyCyperus esculentus var. heermannii

Cyperus esculentus var. heermannii

(Buckley) Britton

Bull. Torrey Bot. Club 13: 211. 1886.

Gordon C. Tucker*, Brian G. Marcks*, J. Richard Carter *
Basionym: Cyperus heermannii Buckley Proc. Acad. Nat. Sci. Philadelphia 1862: 10. 1862
Treatment appears in FNA Volume 23. Treatment on page 169. Mentioned on page 168.

Spikelets ascending-erect, forming less than 40° angle with rachis, closely spaced (2 or more per mm of rachis), 15–25 (–55) mm; floral scales deltate-ovate, widest at 1/4–1/3 length, 2.4–2.6 × 1.7–1.8 mm. Flowers: anthers 1.2 mm; styles 0.9 mm; stigmas 1.6 mm.


Phenology: Fruiting summer.
Habitat: Disturbed soils, croplands
Elevation: 0–1200 m

Distribution

V23 276-distribution-map.jpg

Calif., Fla., Utah, Mexico

Discussion

Cyperus esculentus var. heermannii is the least common and most geographically restricted of the varieties. Its spikes are more dense (2 or more spikelets per mm of rachis) than the other varieties (ca. 1 spikelet per mm of rachis).

Selected References

None.

Lower Taxa

None.

"shortened" is not a number.

... more about "Cyperus esculentus var. heermannii"
RDF feed
Achene architecture
sessile +
Achene atypical length
0.15 cm1.5 mm <br />0.0015 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
Achene atypical width
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
Achene coloration
brown +
Achene length
0.13 cm1.3 mm <br />0.0013 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Achene life cycle
mature +
Achene shape
ellipsoid +
Achene width
0.3mm;0.6mm +
Angle quantity
0;40 +
Anther atypical some measurement
0.15 cm1.5 mm <br />0.0015 m <br /> (0.21 cm2.1 mm <br />0.0021 m <br />) +
Anther fixation
basifixed +
Anther some measurement
1.2 cm12 mm <br />0.012 m <br /> (?) +
Apex shape
obtuse;subacute;acute +
Author
Gordon C. Tucker* +, Brian G. Marcks* +  and J. Richard Carter * +
Authority
(Buckley) Britton +
Base duration
persistent +  and deciduous +
Base shape
decurrent +
Basionyms
Cyperus heermannii +
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 length
1.5 cm15 mm <br />0.015 m <br /> (5 cm50 mm <br />0.05 m <br />) +
Bract atypical quantity
5 (7) +
Bract length
5 cm50 mm <br />0.05 m <br /> (30 cm300 mm <br />0.3 m <br />) +
Bract orientation
less horizontal +  and ascending +
Bract quantity
4;5 +
Bract shape
v--shaped +, v-shaped +  and flanged +
Bract width
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.4 cm4 mm <br />0.004 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 +
Culm architecture or arrangement or growth form
not +  and solitary +
Culm atypical length
60 cm600 mm <br />0.6 m <br /> (100 cm1,000 mm <br />1 m <br />) +
Culm length
15 cm150 mm <br />0.15 m <br /> (60 cm600 mm <br />0.6 m <br />) +
Culm pubescence
glabrous +
Culm relief
scabridulous +
Culm shape
trigonous +
Culm width
0.6mm;3.4mm +
Distal scale architecture
empty +
Distribution
Calif. +, Fla. +, Utah +  and Mexico +
Elevation
0–1200 m +
Embryo position
basal +
Endosperm quantity
abundant +
Floral scale architecture or shape
3-ribbed +  and 7-9-ribbed +
Floral scale arrangement
distichous +
Floral scale atypical length
0.27 cm2.7 mm <br />0.0027 m <br /> (0.34 cm3.4 mm <br />0.0034 m <br />) +
Floral scale atypical width
0.18 cm1.8 mm <br />0.0018 m <br /> (0.24 cm2.4 mm <br />0.0024 m <br />) +
Floral scale coloration
laterally yellowish-brown +  and dark-brown medially brownish punct reddish or greenish +
Floral scale duration
persistent +
Floral scale length
0.24 cm2.4 mm <br />0.0024 m <br /> (0.26 cm2.6 mm <br />0.0026 m <br />) +
Floral scale orientation
appressed +  and spreading +
Floral scale quantity
6 (34) +
Floral scale shape
deltate-ovate +
Floral scale width
0.17 cm1.7 mm <br />0.0017 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
Flower position
hypogynous +  and subtending +
Flower quantity
single +
Flower reproduction
bisexual +
Fruits achene shape
biconvex +  and trigonous +
Habitat
Disturbed soils, croplands +
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 +
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 length
40 cm400 mm <br />0.4 m <br /> (80 cm800 mm <br />0.8 m <br />) +
Leaf atypical width
0.4 cm4 mm <br />0.004 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
Leaf length
20 cm200 mm <br />0.2 m <br /> (?) +  and 40 cm400 mm <br />0.4 m <br /> (?) +
Leaf position
basal +
Leaf quantity
3 (7) +
Leaf shape
v--shaped +, flat +  and v-shaped or flanged +
Leaf width
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 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
1 +
Prickle orientation
antrorse +  and extrorse +
Prophyll architecture
pistillate +
Prophyll atypical quantity
0 (3) +
Prophyll position
subtending +
Prophyll quantity
3 (?) +  and 1 (?) +
Publication title
Bull. Torrey Bot. Club +
Publication year
1886 +
Rachillum architecture
continuous +, articulate +, winged +  and wingless +
Rachillum duration
persistent +
Rachillum life cycle
falling +
Rachis prominence
conspicuous +
Rachis some measurement
4mm;17mm +
Ray arrangement
singly +
Ray atypical some measurement
0.3 cm3 mm <br />0.003 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Ray length
unequal +
Ray quantity
4 +  and 10 +
Ray some measurement
2 cm20 mm <br />0.02 m <br /> (12 cm120 mm <br />0.12 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 276.xml +
Special status
W2 +, W1 +  and Illustrated +
Spike architecture or fragility
loose +
Spike atypical length
1.2 cm12 mm <br />0.012 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
Spike atypical width
1.2 cm12 mm <br />0.012 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
Spike density
dense +
Spike length
1.8 cm18 mm <br />0.018 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Spike quantity
single +
Spike shape
broadly ellipsoid;ovoid or hemispheric +
Spike width
1.8 cm18 mm <br />0.018 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
Spikelet architecture
spicate +
Spikelet architecture or arrangement or growth form
solitary +
Spikelet arrangement
spaced +
Spikelet atypical length
2 cm20 mm <br />0.02 m <br /> (5.5 cm55 mm <br />0.055 m <br />) +
Spikelet atypical quantity
20 (28) +
Spikelet atypical some measurement
25mm;55mm +
Spikelet atypical width
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Spikelet coloration
yellowish-brown +  and dark-brown +
Spikelet length
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Spikelet life cycle
falling +
Spikelet orientation
Ascending-erect (?) +
Spikelet quantity
10 +  and 20 +
Spikelet shape
compressed-quadrangular;linear;linear-lanceoloid +
Spikelet some measurement
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
Spikelet width
1.4mm;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 atypical some measurement
0.23 cm2.3 mm <br />0.0023 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Stigma quantity
3 +
Stigma relief
papillate +
Stigma some measurement
1.6 cm16 mm <br />0.016 m <br /> (?) +
Stolon atypical some measurement
8cm (15cm) +
Stolon diameter
0.6 cm6 mm <br />0.006 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
Stolon fragility
pliable +
Stolon pubescence or texture
soft +
Stolon some measurement
2 cm20 mm <br />0.02 m <br /> (8 cm80 mm <br />0.08 m <br />) +
Stolon texture
spongy +
Style architecture or shape
undivided +
Style arrangement or course or shape
linear +
Style atypical some measurement
0.12 cm1.2 mm <br />0.0012 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
Style shape
2-3-fid +
Style some measurement
0.9 cm9 mm <br />0.009 m <br /> (?) +
Surface coloration or relief
puncticulate +
Synonyms
Undefined subg. Chlorocyperus +, Cyperus subg. Mariscus +  and Undefined subg. Papyrus +
Taxon family
Cyperaceae +
Taxon name
Cyperus esculentus var. heermannii +
Taxon parent
Cyperus esculentus +
Taxon rank
variety +
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
0.3mm +  and 0.5mm +
X chromosome quantity
5;100 +