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Johnson Grass

Scientific Name
Sorghum halepense
Scientific Author
Persoon, C.H. (1805)
Taxonomy
(Magnoliophyta: Liliopsida: Cyperales: Poaceae)
Reliability
High
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Diagnostic Images

Seed Dorsal
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Caption
Seed Project
Source
Clare McLellan Museum Victoria
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Diagnostic Images (9)
Other Images (3)
Diagnostic Notes
Pictured: Spikelet and seed(s)

Description:

Spikelet Appendages: Pedicel and Rachis segments attached

Spikelet Colour: Reddish brown

Spikelet Length: 7 - 10mm

Spikelet shape: Oval with sharp tip, Dorsally compressed

Seed Colour: Reddish brown

Seed Length: 4 - 7mm

Seed Sculpture: Roughened

Seed Shape: Ovoid with sharp tip, Dorsally compressed

Spikelets paired, 4–6 mm long, florets 2; lower spikelet sessile, dorsally compressed, upper spikelet pedicellate, narrower than lower spikelet, terminal spikelets in triplets. Glumes 4–6 mm long, with hairs to 0.5 mm long; lower 3-toothed, 7–11-nerved, 2-keeled, keels winged forming small lateral teeth at apex; upper 5-nerved. Sterile lemma 2–5 mm long, acute or 2-lobed, sometimes with an awn to 7 mm long; palea absent or reduced. Bisexual lemma 4–5 mm long, 2-toothed, awnless, 2-nerved, margins with hairs to 0.5 mm long; palea absent or reduced

Caryopsis exposed between gaping lemma and palea at maturity

Source: See Web Links PlantNET - FloraOnline
More Information
Author
Clare McLellan
Created
27/02/2012 12:20 AEST
Last Updated
17/01/2013 10:05 AEST
Citation
Clare McLellan (2012) Johnson Grass (Sorghum halepense ) Updated on 1/17/2013 10:05:50 AM Available online: PaDIL - http://www.padil.gov.au.
Image Use
Free for use under the Creative Commons Attribution 3.0 Australia License

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