Cyperus compressus

Family (Traditional)Cyperaceae
Species:Cyperus compressus L.
Common NamePoorland Flatsedge
Growth Habitgraminoid
Plant Notes**
CharacteristicsArmaments: No; Milky Sap: No; Photosynthetic: Yes; Stipules: No; Woody Herbaceous: Herbaceous; Duration: Annual; Duration: Perennial; General Ecology: Terrestrial; Growth Habit: graminoid; Region of Origin: North America; Reproductive Phenology: July; Reproductive Phenology: August; Reproductive Phenology: September; 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 0
StatusNative; AGCP (FACW), EMP (FAC) (NWPL); TN[SNR] KY[SNA] (State Rank); G5 (Global Rank)
Specimen(s) View and Download Specimen Details »

** Not applicable or data not available.

Currently no photos are available for this plant.

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
  • 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


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: Campbell (KY), Meade (KY), Whitley (KY), Hardin (TN), Knox (TN), Marion (TN), Shelby (TN), Unicoi (TN), White (TN)

Herbaria represented by specimen data listed below: EKY, ETSU, HTTU, KNK, MEM, TENN, UCHT

Range of years during which specimens were collected: 1965 - 2015

Accession No. (click for full details) County State Coll. Date Collector &
Collection No.
Herbarium &
Herbarium Name Used
31234100073228 Whitley Kentucky 09 Aug 1993 Randy L. Mears
Cyperus compressus
ETSU002247 Unicoi Tennessee 20 Sep 2015 Frosty Levy
Cyperus compressus
31973000011101 Shelby Tennessee
Cyperus compressus
31973000011099 Campbell Kentucky
Cyperus compressus
TENN-V-0037753 Hardin Tennessee
Cyperus compressus
HTTU036375 White Tennessee
Cyperus compressus
TENN-V-0037755 Shelby Tennessee
Cyperus compressus
TENN-V-0037754 Knox Tennessee
Cyperus compressus
UCHT003726 Marion Tennessee
Cyperus compressus
31234100073210 Meade Kentucky 14 Aug 2012 Pat Haragan
Cyperus compressus
MEM000306 Shelby Tennessee 07 Oct 1965 William R. Seals
Cyperus compressus
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