cogongrass

COMMON NAME: Cogongrass
SCIENTIFIC NAME: Imperata cylindrica
FAMILY: Poaceae
LIFECYCLE: Perennial
FEATURES: Growth habit: Aggressive perennial grass species spreading by stiff rhizomes. Upright growth
habit. Height of 2 to 3 feet; Stem: Inflorescence stem rounded, stiff, glabrous. Rhizomes thickened,
scaly, and sharp pointed; Leaf: Off-center white mid-rib, stiff leaf hairs that point back toward the
base of plant (trying sliding your fingers along the leaf blade), torn/damaged leaves often turn purple
at tips.; Collar: Elongated hairs surrounding the collar. Ligule is short and membranous surrounding
the stem. ; Inflorescence: A feathery panicle or plume developing in late winter to early spring prior
to or corresponding to plant emerging from dormancy. Seed have a broad pappus for wind dispersal
adaptation.
DESCRIPTION: Aggressively growing perennial invasive grass. Highly problematic in low management areas and
forestry areas. Forms a dense rhizomatous mat that burns with intense heat destroying native and
desirable plant species. Considered one of the worst invasive weeds in North America. All pictures
provided by Dr. Wilson Faircloth.

Broad View Roadside infestation

Broad View
Roadside infestation

Leaf Leaf

Leaf
Leaf

Flower / Seed Head Seedhead

Flower / Seed Head
Seedhead

Additional Rhizome

Additional
Rhizome

Flower / Seed Head Seedhead

Flower / Seed Head
Seedhead

Broad View Ornamental type

Broad View
Ornamental type