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Weed Identification

slimleaf panicgrass



Scientific Name

Dichanthelium linearifolium

Other Common Names:

slim-leaved panic-grass
long-panicled panic-grass

Synonyms (former Scientific Names):

Panicum linearifolium
Dichanthelium linearifolium var. werneri
Dichanthelium perlongum
Dichanthelium depauperatum var. perlorgum
Panicum perlongum
Panicum strictum
Panicum werneri


This is a perennial grass that grows in a decumbent to upright habit (4 to 16 inches tall) and forms mats or clumps.


They are 7 to 8 inches long and 1.5 to 5 mm wide. The upper surfaces can seem rough to the touch, while the lower surface can have soft or stiff hairs, and the margins are also rough. Leaf has a short hairy ligule (0.5 to 1.5 mm long).

Identifying Characteristics

Dichanthelium grasses can be difficult to separate into their species due to many similarities. This species grows in mats 4 to 16 inches tall. It has leaves that are 7 to 8 inches long and 1.5 to 5 mm wide. It has a short hairy ligule and light green in color. The upper and lower leaf surfaces can vary, but typically the upper surface lacks hair but is rough while the lower surface is mostly hairy. The sheaths can vary in hair characteristics, but are mostly hairy. The nodes are also hairy, while the internodes are smooth/hairless. Most Dichanthelium grasses have open panicles like this species.

Flower Seed Head

It has an open panicle that ranges from up to 2 in long and up to 1.5 in broad. The branches of the panicle are ascending and rough. The spikelets are 2.8 to 3.8 mm long.

Seed Fruit

The seed cover ranges from 1.5 to 2.5 mm in length. The actual seed grain is brownish with an ellipse-like shape, which is 1.5 to 1.8 mm long.

Where Found

Is native to the midwest and eastern parts of the United States, and also middle to eastern Canada. Prefers more wooded environments.

Leaf Hair on Upper Surface

no hairs

Leaf Arrangement

rolled in bud

Mature Leaf Width

less than 5 mm





Life Cycle



not present



Ligule Length

less than 1 mm
1-2 mm

Plant Type