Beckmannia syzigachne

Species category

Weed

Common name

American sloughgrass

Diagnostic characters

Planting unit

SpikeletSpikelet:
One or more florets that are subtended by a pair of bracts called glumes. Spikelets are pedicellate if located on a pedicle and sessile if attached directly to the rachis. Often spikelets with single florets have remnants of a second floret, usually a lemma.

Shape

ObovateObovate:
Inverted egg shaped with apical end the broadest.

Size

  • Length: 2.5–3 mm
  • Width: 2–2.5 mm
  • Thickness: 0.8–0.9 mm 

Color

Light brown

Texture

Smooth

Lemma

Smooth

Palea

Smooth

Other structures

Large bulbous glumesGlume:
The pair of chaffy bracts that occur at the base of a grass spikelet, often completely enclosing it.

Identification notes

GlumesGlume:
The pair of chaffy bracts that occur at the base of a grass spikelet, often completely enclosing it.
with light, smooth, lateral lines.

Noxious weed seed categories

Not listed

AOSA examination list

Not included

Nomenclature

Family

Poaceae

Valid name

Beckmannia syzigachne (Steud.) Fernald

Synonyms

Beckmannia eruciformis auct. non (L.) Host
Beckmannia eruciformis (L.) Host ssp. baicalensis (Kusnez.) Hultén
Beckmannia eruciformis (L.) Host var. uniflora Scribn. ex A. Gray
Beckmannia syzigachne (Steud.) Fernald ssp. baicalensis (Kusnez.) Koyama & Kawano
Beckmannia syzigachne (Steud.) Fernald var. uniflora (Scribn. ex A. Gray) B. Boivin

 Beckmannia syzigachne.  Spikelets with large bulbous glumes.
Beckmannia syzigachne. Spikelets with large bulbous glumes.
 Beckmannia syzigachne.  Caryopses and spikelet tissue. Photo by Anna Margina, USDA-APHIS-PPQ.
Beckmannia syzigachne. Caryopses and spikelet tissue. Photo by Anna Margina, USDA-APHIS-PPQ.