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Weed Seed: Bothriochloa laguroides (Silver beardgrass)

Family

Poaceae

Common Name

Silver beardgrass

Regulation

Prohibited Noxious, Class 1 in the Canadian Weed Seeds Order, 2016 under the Seeds Act. All imported and domestic seed must be free of Prohibited Noxious weed seeds.

Distribution

Canadian: Absent from Canada (Brouillet et al. 2016Footnote 1)

Worldwide: Native to North and South America, from the central United States to Argentina and Chile (USDA-ARS 2016Footnote 2).

Duration of life cycle

Perennial

Seed or fruit type

Spikelet

Identification features

Size

Shape

Surface Texture

Colour

Other Features

Habitat and Crop Association

Field edges, pastures, grasslands, woodlands, river bottoms, and roadsides, on well-drained soils and often on limestone (Barkworth et al. 2003Footnote 3). Reported as a weed in alfalfa, beans and corn in Mexico (Hanan Alipi and Mondragón Pichardo 2009Footnote 4).

General Information

Silver beardgrass has been used in landscaping in the United States (Barkworth et al. 2003Footnote 3).

Similar species

Yellow bluestem (Bothriochloa ischaemum)

Photos

Silver beardgrass (Bothriochloa laguroides) spikelets
Silver beardgrass (Bothriochloa laguroides) spikelets
Silver beardgrass (Bothriochloa laguroides) spikelet, exterior
Silver beardgrass (Bothriochloa laguroides) spikelet, outer side
Silver beardgrass (Bothriochloa laguroides) spikelet, interior
Silver beardgrass (Bothriochloa laguroides) spikelet, inner side
Silver beardgrass (Bothriochloa laguroides) spikelet
Silver beardgrass (Bothriochloa laguroides) spikelet
Silver beardgrass (Bothriochloa laguroides) spikelet outer bract showing short teeth along edge
Silver beardgrass (Bothriochloa laguroides) spikelet outer bract showing short teeth along edge

Similar species

Similar species: Yellow bluestem (Bothriochloa ischaemum) spikelets
Similar species: Yellow bluestem (Bothriochloa ischaemum) spikelets
Similar species: Yellow bluestem (Bothriochloa ischaemum) spikelet, showing teeth along sides of bract
Similar species: Yellow bluestem (Bothriochloa ischaemum) spikelet, showing teeth along sides of bract
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