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Weed Identification

western panicgrass



Scientific Name

Dichanthelium acuminatum var. fasciculatum

Other Common Names:

short-leaved panic grass

Synonyms (former Scientific Names):

Panicum glutinoscabrum
Dichanthelium lanuginosum
Panicum pacificum
Panicum lassenianum
Panicum implicatum
Panicum lanuginosum var. tennesseense
Panicum languidum
Panicum tennesseense
Panicum acuminatum
Panicum brodiei
Panicum lanuginosum var. huachucae
Panicum subvillosum
Panicum lanuginosum var. implicatum
Panicum huachucae
Panicum lindheimeri var. fasciculatum
Panicum occidentale
Dichanthelium subvillosum
Panicum curtifolium


It grows in a decumbent to upright habit, and can reach 0.5 to 2 ft in height.


Leaves are 3 1/2 in long and 1 to 8 mm wide. They are hairy on both surfaces, and the sheaths are also hairy. The leaf has a medium hairy ligule (2 to 4 mm) and taller than other Dichanthelium species.

Identifying Characteristics

This grass forms clumps and has a decumbent to upright habit reaching 2 ft in height. It is one of the hairest Dichanthelium species, and has one of the taller ligules as well. The entire plant including the panicle seedhead has hairs.

Flower Seed Head

Panicle that is up to 4 inches long and 3 inches wide. The rachis and branches can be hairy and rough with spikelets that are elliptical and 1.4 to 2.2 mm long. The spikelets can range from hairless to hairy depending on maturity.

Seed Fruit

The seed grain is 1 to 1.2 mm long

Where Found

Found in sunny to partial shade environments around wooded areas and fields/pastures. Native to all of the mainland United States and Canada (not Alaska)

Leaf Hair on Upper Surface

hairs from base to tip

Leaf Arrangement

rolled in bud

Mature Leaf Width

less than 5 mm
6 to 15 mm





Life Cycle



not present



Ligule Length

1-2 mm
2-3 mm
more than 3 mm

Plant Type