Cyperus difformis

ClassificationMonocots
FamilyCyperaceae
Family (Traditional)Cyperaceae
GenusCyperus
Species:Cyperus difformis L.
Common NameSmall Flower Umbrella Sedge; Variable Flatsedge
Growth Habitgraminoid
Plant Notes**
CharacteristicsArmaments: No; Milky Sap: No; Photosynthetic: Yes; Stipules: No; Woody Herbaceous: Herbaceous; Natural Area Presence: LC; Natural Area Presence: LGS; Duration: Annual; General Ecology: Mudflat; General Ecology: Terrestrial; Growth Habit: graminoid; Moisture Requirements: Hydric; Moisture Requirements: Wetland; Region of Origin: Africa; Region of Origin: Asia; Region of Origin: Europe; Reproductive Phenology: July; Reproductive Phenology: August; Reproductive Phenology: September; Reproductive Phenology: October; Leaf Arrangement: basal; Leaf Complexity: simple; Leaf Dissection: 0; Leaf Fragrance: No; Leaf Persistance: Deciduous; Leaf Petiole Type: sessile; Leaf Rank: 3-ranked; Leaf Type: grass-like; Leaf Venation: parallel; Leaflet Margins: entire; Leaflet Number: 0; Base Flower Color: Brown (incl. Maroon); Base Flower Color: Green; Fruit Dehiscence: No; Fruit Type: Achene; Fruit Wet/Dry: Dry; Hypanthium Present: No; Ovary Position: Superior; Overall Flower Symmetry: N/A; Perianth Present: No; Placentation Type: Basal; Sporangium Arrangement: N/A
C value N/A
StatusNot Native; AGCP (OBL), EMP (OBL) (NWPL); TN[SNA] KY[SNA] (State Rank); GNR (Global Rank)
Specimen(s) View and Download Specimen Details »

** Not applicable or data not available.
Featured Plant Photo

Species Distribution Map

This species has been reported in the counties highlighted in the interactive distribution map below. Click on a county to display the its name. Click the question mark icon () to view additional information about the ecoregions shown. In the map legend, there are links to toggle the visibility of the ecoregions and/or their labels. In addition, clicking on an ecoregion name will highlight that region on the map.

  • State Boundaries
  • Counties
  • Counties - Species Present
Ecoregions
  • Southeastern Plains
    • Blackland Prarie
  • Blue Ridge Mountains
  • Ridge and Valley
  • Cumberland Plateau
  • Cumberland Mountains
  • Allegheny Plateau
  • Interior Plateau
    • Bluegrass Region
    • Nashville Basin
    • Pennyroyal Karst Plain
    • Western Highland Rim
    • Eastern Highland Rim

Synonyms

No synonyms exist for this species.

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.

Counties included on distribution map: Floyd (KY), Jefferson (KY), Knott (KY), Laurel (KY), Pike (KY), Simpson (KY), Whitley (KY), Campbell (TN), Knox (TN), Marion (TN), Meigs (TN), Putnam (TN)

Herbaria represented by specimen data listed below: APSC, BEREA, EKY, HTTU, KNK, TENN

Range of years during which specimens were collected: 1993 - 1995

Accession No. (click for full details) County State Coll. Date Collector &
Collection No.		 Herbarium &
Herbarium Name Used
TENN-V-0037763 Campbell Tennessee
TENN
Cyperus difformis
APSC0036004 Marion Tennessee
APSC
Cyperus difformis
TENN-V-0037765 Marion Tennessee
TENN
Cyperus difformis
31234100073459 Laurel Kentucky 18 Sep 1994 Randy L. Mears
421		 EKY
Cyperus difformis
TENN-V-0037764 Knox Tennessee
TENN
Cyperus difformis
BEREA003976 Pike Kentucky 11 Sep 1993 Randy L. Mears
s.n.		 BEREA
Cyperus difformis
TENN-V-0037768 Meigs Tennessee
TENN
Cyperus difformis
APSC0036001 Meigs Tennessee
APSC
Cyperus difformis
APSC0039998 Knox Tennessee
APSC
Cyperus difformis
HTTU007367 Putnam Tennessee
HTTU
Cyperus difformis
31234100073426 Floyd Kentucky 29 Sep 1994 Randy L. Mears
444		 EKY
Cyperus difformis
31234100073483 Whitley Kentucky 13 Aug 1994 Randy L. Mears
403		 EKY
Cyperus difformis
BEREA003978 Whitley Kentucky 13 Aug 1994 Randy L. Mears
403		 BEREA
Cyperus difformis
BEREA003977 Simpson Kentucky 14 Sep 1995 Randy L. Mears, Gary Libby
 BEREA
Cyperus difformis
BEREA003975 Laurel Kentucky 18 Sep 1994 Randy L. Mears
421		 BEREA
Cyperus difformis
TENN-V-0242585 Jefferson Kentucky
TENN
Cyperus difformis
TENN-V-0037767 Marion Tennessee
TENN
Cyperus difformis
APSC0041094 Marion Tennessee
APSC
Cyperus difformis
31234100073442 Knott Kentucky 15 Aug 1993 Randy L. Mears
 EKY
Cyperus difformis
31973000011116 Simpson Kentucky
KNK
Cyperus difformis
TENN-V-0037769 Meigs Tennessee
TENN
Cyperus difformis
TENN-V-0037766 Marion Tennessee
TENN
Cyperus difformis
APSC0039999 Meigs Tennessee
APSC
Cyperus difformis
31234100073434 Floyd Kentucky 15 Aug 1993 Randy L. Mears
 EKY
Cyperus difformis
BEREA003974 Floyd Kentucky 29 Sep 1994 Randy L. Mears
444		 BEREA
Cyperus difformis
TENN-V-0243543 Marion Tennessee
TENN
Cyperus difformis
31234100073467 Pike Kentucky 11 Sep 1993 Randy L. Mears
 EKY
Cyperus difformis
31234100073475 Simpson Kentucky 14 Sep 1995 Randy L. Mears
s.n.		 EKY
Cyperus difformis
APSC0039997 Marion Tennessee
APSC
Cyperus difformis
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Plant Photos

Cyperus difformis - Theo Witsell
Cyperus difformis - Theo Witsell