Cyperus iria

Family:CYPERACEAE
Species:Cyperus iria Linnaeus
Common Name:Rice Flatsedge; Rice Field Flatsedge
Habitat:**
Associated Ecological Communities:**
Growth Habit:Herb
Duration:**
Category:Vascular
USDA Symbol:**
Plant Notes:Rice Flatsedge is an introduced herbaceous annual in the Sedge family (Cyperaceae). It is probably native to Asia, but is now found worldwide. In Alabama it can be found throughout the state. Rice Flatsedge grows in ditches, in wet depressions, in low fields, and in other wet, disturbed habitats. It is a clump forming annual with fibrous reddish-yellow roots. The stems are 3-angled, glabrous, and 1-2 feet in height. Leaves are basal, lance-linear, glabrous, scabrid on the margins and mid-rib, and v-shaped. The leaf sheath is reddish-brown and wraps around the stem. Flowers are produced in open umbels of spikes. The spikes are subtended by 4-7 leaf-like bracts. The spikes are golden-brown in color, sessile, elongate, and spreading. The fruit is an obovoid brown achene. Rice Flatsedge is considered one of the world’s worst weeds. It is a major weed in rice, cotton, soybean and other crops.—A. Diamond
Taxonomic Notes:**
Status:Not Native, FACW (NWI)
References:**
Specimen: View specimen details in the Alabama Herbarium Consortium Specimen Database

** Not applicable or data not available.

Classification

FamilyCYPERACEAE - Sedge family
Genus Cyperus
Species Cyperus iria Linnaeus - Rice Flatsedge; Rice Field Flatsedge

Citation

Citation CYPERUS IRIA Linnaeus, Sp. Pl. 45. 1753.
Basionym: **
Type: INDIA: Without data, Osbeck s.n. (lectotype: LINN 70.16). Lectotypified by G. C. Tucker, Syst. Bot. Monogr. 43: 91. 1994.

** Not applicable or data not available.

Synonyms

SynonymFull CitationBasionymType
Chlorocyperus iria Chlorocyperus iria (Linnaeus) Rikli, Jahrb. Wiss. Bot. 27: 564. 1895.Cyperus iria Linnaeus 1753. 
Cyperus chrysomelinus Cyperus chrysomelinus Link, Hort. Berol. 1: 305. 1827. NEPAL
Cyperus diaphaniria Cyperus diaphaniria Steudel, Syn. Pl. Glumac. 2: 23. 1854. INDONESIA: Java:
Cyperus iria var. paniciformis Cyperus iria Linnaeus, var. paniciformis (Franchet & Savatier) C. B. Clarke, in Hooker f., Fl. Brit. India 6: 607. 1893.Cyperus paniciformis Franchet & Savatier 1878. 
Cyperus iria var. parviflorus Cyperus iria Linnaeus, var. parviflorus Miquel, Fl. Ned. Ind. 3: 270. 1859.  
Cyperus iria var. rectangularis Cyperus iria Linnaeus, var. rectangularis Kükenthal, in Engler, Pflanzenr. 4(Heft 101): 152. 1935.  
Cyperus iria var. santonici Cyperus iria Linnaeus, var. santonici (Rottbøll) Fernald & Griscom, Rhodora 37: 146. 1935.Cyperus santonici Rottbøll 1772. 
Cyperus microlepis Cyperus microlepis Baker, Fl. Maurit. 410. 1877. MAURITIUS
Cyperus nangtciangensis Cyperus nangtciangensis Pampanini, Nuovo Giorn. Bot. Ital., ser. 2. 22: 260. 1915.  
Cyperus nuttalii Cyperus nuttalii Llanos, Fragm. Pl. Filip. 14. 1851, non C. nuttallii Torrey 1836.  
Cyperus paniciformis Cyperus paniciformis Franchet & Savatier, Enum. Pl. Jap. 2: 537. 1878. JAPAN
Cyperus panicoides Cyperus panicoides Lamarck, Tabl. Encycl. 1: 145. 1791.  
Cyperus resinosus Cyperus resinosus Hochstetter ex Steudel, Syn. Pl. Glumac. 2: 23. 1854.  
Cyperus santonici Cyperus santonici Rottbøll, Descr. Pl. Rar. Pl. 19. 1772.  
Cyperus seminudus Cyperus seminudus Zollinger & Moritzi, in Moritzi, Syst. Verz. 96. 1846, non Roxburgh 1820.  

Specimens and Distribution

This species has been reported in the following counties by the herbaria listed. An overview of the individual specimens are provided in the table that follows. Click on the accession number to view details; click on column headers to sort; choose a county or herbaria to filter the specimen data.

Counties included on distribution map: Autauga, Baldwin, Barbour, Blount, Bullock, Butler, Calhoun, Cherokee, Choctaw, Cleburne, Conecuh, Coosa, Covington, Crenshaw, Dallas, DeKalb, Elmore, Escambia, Etowah, Franklin, Greene, Houston, Jackson, Jefferson, Lamar, Lee, Limestone, Macon, Madison, Marengo, Marshall, Mobile, Monroe, Montgomery, Morgan, Perry, Pike, Randolph, Sumter, Talladega, Tuscaloosa, Walker, Wilcox

Counties represented by specimen data listed below:

Herbaria represented by specimen data listed below: ALNHS, AUA, JSU, NY, SAMF, TROY, UNA, USAM, UWAL, UWFP

Range of years during which specimens were collected: 1950 - 1997

Barcode / Accession No. County Coll. Date Collector &
Collection No.
Herbarium &
Herbarium Name Used
Image
TROY000025467 Crenshaw 13 Aug 2004 Diamond, Alvin R.
14612
TROY
Cyperus iria Linnaeus
AUA000021073 Cleburne 11 Sep 1975 Rutland, David W.
1571
AUA
Cyperus Iria L.
JSU112017 Jefferson 14 Sep 1985 Barber, J. Patrick
1777
JSU
Cyperus iria Linnaeus
JSU111993 Calhoun 3 Aug 1982 Whetstone, R. David
11798
JSU
Cyperus iria Linnaeus
UWAL0039789 Houston 18 Aug 2016 Diamond, Alvin R.
27619
UWAL
Cyperus iria Linnaeus
JSU112024 Morgan 7 Aug 1975 Whetstone, R. David
5960
JSU
Cyperus iria Linnaeus
JSU112010 Franklin 15 Oct 1975 Whetstone, R. David
7068
JSU
Cyperus iria Linnaeus
AUA000021080 Lee 3 Oct 1971 Landers, Susan
077
AUA
Cyperus Iria L.
UWAL0051844 Bullock 01 Jul 2020 Horne, Howard E.
4950
UWAL
Cyperus iria Linnaeus
JSU112006 Etowah 18 Oct 1975 Whetstone, R. David
6872
JSU
Cyperus iria Linnaeus
AUA000021079 Elmore 1 Aug 1948 Searcy, V.S.
AUA
Cyperus Iria L.
UWAL0003256 Crenshaw 25 Aug 2009 Diamond, A.R.
20906
UWAL
Cyperus iria L.
TROY000049058 Escambia 02 Sep 2019 Diamond, Alvin R.
29068
TROY
Cyperus iria Linnaeus
UNA00059271 Pike 18 Sep 2002 Woods, Michael
9785
UNA
Cyperus iria L.
JSU111997 Calhoun 24 Aug 1982 Whetstone, R. David
11977
JSU
Cyperus iria Linnaeus
UNA00001811 Tuscaloosa 01 Aug 1957 Hancock, Kenneth F.
s.n.
UNA
Cyperus iria L.
JSU112020 Madison 22 Sep 1995 Threlkeld, Steven J.
67
JSU
Cyperus iria Linnaeus
UNA00054303 Blount 11 Jul 1998 Keener, Brian R.
1210
UNA
Cyperus iria L.
TROY000025462 Butler 02 Sep 2006 Diamond, Alvin R.
16854
TROY
Cyperus iria Linnaeus
NYv-035-00663875 Marshall 28 Oct 1982 David H. Webb
4747
NY
Cyperus iria Linnaeus
JSU112000 Cherokee 8 Oct 1994 Spaulding, Daniel D.
6658
JSU
Cyperus iria Linnaeus
JSU112023 Morgan 7 Aug 1975 Whetstone, R. David
5960
JSU
Cyperus iria Linnaeus
USAM000004547 Mobile 24 Aug 1980 LeLong, Michel G.
11350
USAM
Cyperus iria Linnaeus
AUA000021077 Crenshaw 13 Sep 2004 Diamond, Alvin R.
14612
AUA
Cyperus Iria L.
UWAL0046652 Autauga 13 Oct 2016 Parker, Matthew R.
213
UWAL
Cyperus iria Linnaeus
JSU112005 Etowah 18 Oct 1975 Whetstone, R. David
6872
JSU
Cyperus iria Linnaeus
AUA000043876 Lee 28 Sep 2018 Schotz, Alfred
CSP-542
AUA
Cyperus Iria L.
UWAL0014861 Coosa 12 Jul 2013 Diamond, Alvin R.
24342
UWAL
Cyperus iria Linnaeus
JSU111991 Calhoun 22 Jun 1982 Whetstone, R. David
11349
JSU
Cyperus iria Linnaeus
UNA00062921 Covington 27 Jul 2004 Diamond, Alvin R.
14527
UNA
Cyperus iria L.
JSU111996 Calhoun 24 Aug 1982 Whetstone, R. David
11977
JSU
Cyperus iria Linnaeus
AUA000021083 Pike 19 Aug 2004 Diamond, Alvin R.
14619
AUA
Cyperus Iria L.
USAM000004550 Wilcox 18 Aug 1972 LeLong, Michel G.
6758
USAM
Cyperus iria Linnaeus
UWFP019800 Escambia 23 Aug 2014 James R. Burkhalter
UWFP
Cyperus iria L.
TROY000025464 Pike 14 Aug 2004 Diamond, Alvin R.
14619
TROY
Cyperus iria Linnaeus
UWAL0033342 Franklin 13 Aug 2016 England, J. Kevin
6735
UWAL
Cyperus iria Linnaeus
JSU112002 DeKalb 3 Oct 1992 Spaulding, Daniel D.
3181
JSU
Cyperus iria Linnaeus
UNA00001816 DeKalb 13 Oct 1951 Harper, Roland M.
4188
UNA
Cyperus iria L.
JSU112019 Limestone 14 Jun 1996 Whetstone, R. David
18052
JSU
Cyperus iria Linnaeus
AUA000021078 Dallas 28 Jun 2003 Spaulding, Daniel D.
11940
AUA
Cyperus Iria L.
UWAL0014762 Bullock 31 Aug 2012 Dykes, Bailee
1214
UWAL
Cyperus iria Linnaeus
TROY000025469 Pike 18 Sep 2002 Woods, Michael
9785
TROY
Cyperus iria Linnaeus
JSU112016 Jefferson 17 Oct 1975 Whetstone, R. David
7193
JSU
Cyperus iria Linnaeus
AUA000021075 Covington 27 Jul 2004 Diamond, Alvin R.
14527
AUA
Cyperus Iria L.
JSU112008 Etowah 4 Sep 1995 Hodge-Spaulding, Lesley M.
4328
JSU
Cyperus iria Linnaeus
UWFP019799 Escambia 04 Sep 2010 James R. Burkhalter
22845
UWFP
Cyperus iria L.
JSU111994 Calhoun 24 Aug 1982 Whetstone, R. David
11977
JSU
Cyperus iria Linnaeus
ALNHS00000325 Macon 29 Jun 1998 Crow, D.G.
s.n.
ALNHS
Cyperus iria L.
TROY000025274 Sumter 30 Jul 1980 Dalrymple, Larry
25
TROY
Cyperus iria Linnaeus
UWAL0050124 Autauga 21 Sep 2017 Parker, Matthew R.
1303
UWAL
Cyperus iria Linnaeus
AUA000021076 Crenshaw 7 Aug 1995 Diamond, Alvin R.
9810
AUA
Cyperus Iria L.
UWAL0043004 Baldwin 28 Jul 2002 Larsen, H.S.
1071
UWAL
Cyperus iria L.
JSU112021 Marshall 24 Jul 1992 Spaulding, Daniel D.
2422
JSU
Cyperus iria Linnaeus
UNA00001801 Barbour 15 Aug 1955 Harper, Roland M.
4332
UNA
Cyperus iria L.
JSU112001 Choctaw 13 Sep 1997 Higginbotham, Jerri W.
206
JSU
Cyperus iria Linnaeus
AUA000021084 Sumter 30 Jul 1980 Freeman, John D.
25
AUA
Cyperus Iria L.
TROY000025461 Barbour 26 Jul 2000 Diamond, Alvin R.
11895
TROY
Cyperus iria Linnaeus
JSU112015 Jefferson 17 Oct 1975 Whetstone, R. David
7193
JSU
Cyperus iria Linnaeus
TROY000049335 Autauga 05 Oct 2018 Parker, Matthew R.
1855
TROY
Cyperus iria Linnaeus
JSU112007 Etowah 28 Sep 1994 Hodge, Lesley M.
3963b
JSU
Cyperus iria Linnaeus
TROY000037567 Coosa 12 Jul 2013 Diamond, Alvin R.
24342
TROY
Cyperus iria Linnaeus
JSU112009 Etowah 13 Nov 1992 Spaulding, Daniel D.
3297
JSU
Cyperus iria Linnaeus
ALNHS00000375 Jackson 23 Sep 2009 Barger, T. Wayne
HC-373
ALNHS
Cyperus iria L.
USAM000004551 Greene 19 Oct 1979 LeLong, Michel G.
10987
USAM
Cyperus iria Linnaeus
UNA00065604 Pike 6 Sep 2006 Diamond, Alvin R.
16856
UNA
Cyperus iria L.
TROY000036131 Bullock 31 Aug 2012 Dykes, Bailee
1214
TROY
Cyperus iria Linnaeus
SAMF0001082 Perry 03 Nov 2005 Davenport, Lawrence J.
3385
SAMF
Cyperus iria Linnaeus
JSU112022 Marshall 4 Sep 1992 Spaulding, Daniel D.
2812
JSU
Cyperus iria Linnaeus
UNA00058648 Lamar 28 Jul 2002 Keener, Brian R.
2308
UNA
Cyperus iria L.
JSU111992 Calhoun 5 Aug 1982 Whetstone, R. David
11843
JSU
Cyperus iria Linnaeus
USAM000004546 Baldwin 23 Aug 1980 LeLong, Michel G.
11338
USAM
Cyperus iria Linnaeus
TROY000025466 Dallas 28 Jun 2003 Spaulding, Daniel D.
11940
TROY
Cyperus iria Linnaeus
UWAL0013200 Marengo 25 Jul 2013 England, J. Kevin
4441
UWAL
Cyperus iria Linnaeus
JSU112004 Etowah 18 Oct 1975 Whetstone, R. David
6872
JSU
Cyperus iria Linnaeus
AUA000021082 Pike 29 Jul 1996 Diamond, Alvin R.
10422
AUA
Cyperus Iria L.
JSU111999 Cherokee 22 Sep 1996 Spaulding, Daniel D.
9278
JSU
Cyperus iria Linnaeus
UNA00062931 Pike 19 Aug 2004 Diamond, Alvin R.
14619
UNA
Cyperus iria L.
JSU111995 Calhoun 24 Aug 1982 Whetstone, R. David
11977
JSU
Cyperus iria Linnaeus
AUA000021074 Conecuh 19 Aug 1995 Diamond, Alvin R.
9861
AUA
Cyperus Iria L.
UWAL0014890 Elmore 11 Aug 2013 Diamond, Alvin R.
24447
UWAL
Cyperus iria Linnaeus
AUA000027000 Baldwin 13 Aug 2008 Barger, T. Wayne
PERD-453
AUA
Cyperus Iria L.
USAM000004552 Wilcox 27 Sep 1978 Haynes, Robert R.
6963
USAM
Cyperus iria Linnaeus
JSU112012 Jefferson 28 Aug 1985 Barber, J. Patrick
1719
JSU
Cyperus iria Linnaeus
AUA000021081 Lee 26 Jul 1962 Hackney, Peter A.
AUA
Cyperus Iria L.
SAMF0001880 Randolph 14 Oct 2013 Davenport, Lawrence J.
5577
SAMF
Cyperus iria Linnaeus
AUA000028867 Macon 29 Jun 1998 C, D G
XII 21
AUA
Cyperus Iria L.
TROY000029365 Crenshaw 25 Aug 2009 Diamond, Alvin R.
20906
TROY
Cyperus iria Linnaeus
JSU112014 Jefferson 17 Oct 1975 Whetstone, R. David
7193
JSU
Cyperus iria Linnaeus
TROY000025468 Covington 27 Jul 2004 Diamond, Alvin R.
14527
TROY
Cyperus iria Linnaeus
UNA00001877 Bullock _ Sep 1949 Viccars, Marion
s.n.
UNA
Cyperus iria L.
JSU112003 Etowah 14 Aug 1994 Hodge, Lesley M.
3042
JSU
Cyperus iria Linnaeus
TROY000010307 Butler 06 Jul 2007 Diamond, Alvin R.
18034
TROY
Cyperus iria Linnaeus
USAM000004553 Mobile 05 Oct 1973 LeLong, Michel G.
7316
USAM
Cyperus iria Linnaeus
TROY000040800 Marengo 23 Jul 2011 Keener, Brian R.
6609
TROY
Cyperus iria Linnaeus
UNA00001806 Tuscaloosa 14 Aug 1950 Williams, B.C.
s.n.
UNA
Cyperus iria L.
TROY000049330 Autauga 21 Sep 2017 Parker, Matthew R.
1303
TROY
Cyperus iria Linnaeus
UWAL0019347 Limestone 24 Aug 1991 Kral, R.
79615
UWAL
Cyperus iria L.
UNA00062287 Dallas 28 Jun 2003 Spaulding, Daniel D.
11940
UNA
Cyperus iria L.
JSU112013 Jefferson 15 Aug 1984 Barber, J. Patrick
935
JSU
Cyperus iria Linnaeus
TROY000045688 Autauga 13 Oct 2016 Parker, Matthew R.
213
TROY
Cyperus iria Linnaeus
UWAL0003257 Walker 20 Jul 2002 Keener, Brian R.
2289
UWAL
Cyperus iria L.
TROY000050189 Baldwin 16 Sep 1993 Horne, Howard E.
15
TROY
Cyperus iria Linnaeus
TROY000038337 Elmore 11 Aug 2013 Diamond, Alvin R.
24447
TROY
Cyperus iria Linnaeus
JSU112025 Talladega 28 Jul 1992 Ballard, J. Mark
828
JSU
Cyperus iria Linnaeus
TROY000025463 Baldwin 27 Jul 2006 Diamond, Alvin R.
16737
TROY
Cyperus iria Linnaeus
UNA00001892 Wilcox 27 Sep 1978 Haynes, Robert R.
6963
UNA
Cyperus iria L.
JSU111998 Calhoun 14 Oct 1994 Ballard, J. Mark
5316
JSU
Cyperus iria Linnaeus
TROY000025470 Barbour 17 Jul 2008 Diamond, Alvin R.
19544
TROY
Cyperus iria Linnaeus
USAM000004548 Mobile 04 Aug 1969 LeLong, Michel G.
5214
USAM
Cyperus iria Linnaeus
TROY000010308 Monroe 20 Sep 2007 Diamond, Alvin R.
18236
TROY
Cyperus iria Linnaeus
UNA00050610 Houston 20 Jul 1997 MacDonald, John R.
10865
UNA
Cyperus iria L.
TROY000049318 Autauga 28 Jul 2017 Parker, Matthew R.
1042
TROY
Cyperus iria Linnaeus
UNA00001882 Mobile 15 Aug 1966 Deramus, Rebecca
D982
UNA
Cyperus iria L.
JSU112018 Jefferson 14 Sep 1985 Barber, J. Patrick
1777
JSU
Cyperus iria Linnaeus
TROY000049515 Marengo 25 Jul 2013 England, J. Kevin
4441
TROY
Cyperus iria Linnaeus
UWAL0011936 Marengo 23 Jul 2011 Keener, Brian R.
6609
UWAL
Cyperus iria Linnaeus
TROY000029672 Montgomery 20 Oct 2009 Diamond, Alvin R.
21087
TROY
Cyperus iria Linnaeus
JSU112011 Franklin 15 Oct 1975 Whetstone, R. David
7068
JSU
Cyperus iria Linnaeus
UNA00001887 Montgomery 17 Aug 1978 Wiersema, John H.
441
UNA
Cyperus iria L.
USAM000004549 Baldwin 15 Jun 1974 LeLong, Michel G.
7860
USAM
Cyperus iria Linnaeus
TROY000010309 Montgomery 01 Nov 2007 Diamond, Alvin R.
18592
TROY
Cyperus iria Linnaeus
UNA00001841 Wilcox 22 Oct 1977 Haynes, Robert R.
6390
UNA
Cyperus iria L.
UWAL0050311 Elmore 17 Jun 2020 Diamond, Alvin R.
29324
UWAL
Cyperus iria Linnaeus
TROY000044158 Houston 18 Aug 2016 Diamond, Alvin R.
27619
TROY
Cyperus iria Linnaeus
SAMF0001081 Jefferson 24 Aug 1985 Davenport, Lawrence J.
2425
SAMF
Cyperus iria Linnaeus
TROY000025465 Pike 06 Sep 2006 Diamond, Alvin R.
16856
TROY
Cyperus iria Linnaeus
UNA00001897 Mobile 10 Aug 1957 Hancock, Kenneth F.
s.n.
UNA
Cyperus iria L.
First Page Previous Page Next Page Last Page
Records per Page: