Sorghum

Species category

Weed

Common name

sorghum

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

Lanceolate

Size

  • Length 5–5.5 mm
  • Width 2–2.5 mm
  • Thickness 0.8–1 mm

Color

Yellow to black and mixtures in between

Texture

Hairs on pedicelPedicel:
The stalk within an inflorescence supporting a single flower or spikelet.
and rachis segmentRachis segment:
A segment of the central axis of the inflorescence (rachis). In some species (e.g. Andropogon) separation of the sessile spikelets occurs when the rachis disarticulates at the spikelet bases leaving the segment of the rachis between spikelets attached to the lower spikelet.
; 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.
surface smooth.

Lemma

Very thin usually not visible

Palea

Very thin usually not visible

Other structures

Intact pedicelPedicel:
The stalk within an inflorescence supporting a single flower or spikelet.
and rachis segmentRachis segment:
A segment of the central axis of the inflorescence (rachis). In some species (e.g. Andropogon) separation of the sessile spikelets occurs when the rachis disarticulates at the spikelet bases leaving the segment of the rachis between spikelets attached to the lower spikelet.
with cups on apices

Identification notes

This unit appears very much like Sorghum halepense except that it is somewhat larger. The intact pedicelPedicel:
The stalk within an inflorescence supporting a single flower or spikelet.
and rachis segmentRachis segment:
A segment of the central axis of the inflorescence (rachis). In some species (e.g. Andropogon) separation of the sessile spikelets occurs when the rachis disarticulates at the spikelet bases leaving the segment of the rachis between spikelets attached to the lower spikelet.
make it very similar to S. halepense, however.

Noxious weed seed categories

State Noxious Weed: Alabama, California, Delaware, Illinois, Kansas, Kentucky, Maryland, Minnesota, Mississippi, New Jersey, Nevada, Pennsylvania, South Carolina, Texas, Utah, Virginia, Washington

AOSA examination list

Not included

Nomenclature

Family

Poaceae

Valid name

Sorghum Moench

 Sorghum.  Yellow to black spikelets.
Sorghum. Yellow to black spikelets.
From Left to Right: 1.  Sorghum × almum  2.  Sorghum × drummondii  3.  Sorghum halepense  4.  Sorghum  .
From Left to Right: 1. Sorghum × almum 2. Sorghum × drummondii 3. Sorghum halepense 4. Sorghum .