Native & Naturalized Plants of the Carolinas & Georgia


748

Grass, Sedge, or Rush
Perennial

Non-native: Tropics
Documented growing wild in GA NC SC

Common in Coastal Plain (rare elsewhere) (rare in NC)

Look for it on grassy roadsides. An extremely aggressive and dangerous weed, now well-established and rapidly invading fire-maintained Coastal Plain areas (such as longleaf pine and slash pine flatwoods and longleaf pine clayhills) on the Gulf Coastal Plain of FL, AL, and MS, per Weakley's Flora

map
To see a detailed map, click here


INVASIVE

This plant is causing problems in natural areas outside its native range, according to authorities such as:

Alabama Invasive Plant Council, 2012
Brooklyn Botanic Garden
Georgia Exotic Pest Plant Council, 2006
SC Exotic Pest Plant Council, 2014
SC List of Regulated Pest Plant Species, 2017
Tennessee Exotic Pest Plant Council, 2009
US Fish & Wildlife Service
US Forest Service Southern Research Station
USDA Federal Noxious Weed List, 093014
Virginia Department of Conservation and Recreation, 2014

 

LEAVES:
Simple
Most leaves arising from near the base, with overlapping sheaths

FLOWER:
Spring
Spikelets with silvery-white hairs

FRUIT:
Spring/Summer
Grain brown
Grain

 

TO LEARN MORE about this plant, look it up in a good book!



Spermatophytes (seed plants): Angiosperms (flowering plants): Monocots: Commelinids: Poales

WEAKLEY'S FLORA (11/30/12):
Imperata cylindrica   FAMILY Poaceae

GREATER THAN PLANTS NATIONAL DATABASE:
Imperata cylindrica   FAMILY Poaceae

GREATER THAN Manual of the Grasses of the US (Hitchcock & Chase, 1950)
Imperata brasiliensis

GREATER THAN Manual of the Grasses of the US (Hitchcock & Chase, 1950)
Imperata cylindrica

 

COMMON NAME:
Cogongrass, Bloodroot Grass, Brazilian Satintail


Click or hover over the thumbnails to see larger pictures.

image of Imperata cylindrica

    wwwcofcedu_cogongrass

        

www.cofc.edu/~everettj/cogongrass.html

image of Imperata cylindrica

    wwwplantsifasufl_cogon

        

plants.ifas.ufl.edu/impcyl.html

image of Imperata cylindrica

JK Marlow    jkm080604_003

June    Greenville County    SC

Roadside

Spikelike, tightly branched panicle. Spikelets obscured by silky hairs, per Nonnative Invasive Plants of Southern Forests.

image of Imperata cylindrica

JK Marlow    jkm080604_010

June    Greenville County    SC

Roadside

image of Imperata cylindrica

JK Marlow    jkm080604_021

June    Greenville County    SC

Roadside

Silky spikelike panicles are terminal, cylindrical, 1-8" long, 0.2-1" wide, per Nonnative Invasive Plants of Southern Forests.

image of Imperata cylindrica

JK Marlow    jkm080604_038

June    Greenville County    SC

Roadside

image of Imperata cylindrica

JK Marlow    s080604_d1

June    Greenville County    SC

Roadside

image of Imperata cylindrica

JK Marlow    s080604_d2

June    Greenville County    SC

Roadside

image of Imperata cylindrica

JK Marlow    s080604_e

June    Greenville County    SC

Roadside

image of Imperata cylindrica

JK Marlow    s080604_e2

June    Greenville County    SC

Roadside

Grain released with hairy husks for wind dispersal, per Forest Plants of the Southeast and Their Wildlife Uses.

image of Imperata cylindrica

JK Marlow    jkm080702_009

July    Pickens County    SC

image of Imperata cylindrica

JK Marlow    jkm080702_013

July    Pickens County    SC

Leaf margins finely serrate, per Field Guide to the Identification of Cogongrass.

image of Imperata cylindrica

JK Marlow    jkm080702_020

July    Pickens County    SC

Cogongrass blades are varying heights - even as high as 6' - averaging 3-4'

image of Imperata cylindrica

JK Marlow    jkm080702_041

July    Pickens County    SC

New plants arise from horizontal underground stems or "rhizomes", per Field Guide to the Identification of Cogongrass.

image of Imperata cylindrica

JK Marlow    jkm080702_045

July    Pickens County    SC

Cogongrass typically grows in dense patches, often circular, per Field Guide to the Identification of Cogongrass.

image of Imperata cylindrica

Jean Everett    jbeicylindrica_clumpsmtg

November    Charleston County    SC

Francis Marion National Forest

Clumps about to meet.

image of Imperata cylindrica

Jean Everett    jbeicylindrica_habit

November    Charleston County    SC

Francis Marion National Forest

Habit.

image of Imperata cylindrica

Jean Everett    jbeicylindrica_leaftop

November    Charleston County    SC

Francis Marion National Forest

Top side of leaf.

image of Imperata cylindrica

Jean Everett    jbeicylindrica_lfmidvein

November    Charleston County    SC

Francis Marion National Forest

Off center midvein.

image of Imperata cylindrica

Jean Everett    jbeicylindrica_roadside

November    Charleston County    SC

Francis Marion National Forest

Roadside stand.

image of Imperata cylindrica

Jean Everett    jbeicylindrica_sheathb

November    Charleston County    SC

Francis Marion National Forest

Hairs on sheath.