Details of...
Scientific Name: Elymus repens ssp. repens ( syn. Agropyron repens )
Pronunciation: ELL-ih-muss REE-penz subspecies REE-penz
Common Name: quackgrass , couchgrass
Family Name: Poaceae
Plant Type: Herbaceous perennial, Poales (grass-like), Invasive plant, Weed (horticultural)
Key ID Features: Stems (culms) 40-150 cm tall; rhizomes long, aggressive, sharp-pointed with yellowish tips; leaves linear, 15-40 cm long and 3-10 mm broad at the base of the plant, with leaves higher on the stems 2-8 mm broad, vernation rolled, blade rough on the upper surface, not glossy, auricles 1 mm long, slender and overlapping to clasp the culm, ligule 0.5-1 mm long, sheath not compressed, base with trichomes; flower spike 10-30 cm long, spikelets 1–2 cm long, 5-7 mm broad and 3 mm thick with three to eight florets, glumes 7-12 mm long, usually without an awn or with only a short one. (Wikipedia)
Course(s): not used (on campus)

Habit: Spreading, Upright
Form: Vase
Texture: Medium - fine
Mature Size:
Height:0.7 - 1.3m
Spread:0.3 - 0.6m
Growth Rate:Fast
Hardiness Rating: Zone 3: (-40 to -34 C)
Soil/ Growing Medium:
Landscape Uses:
Additional Info: Google. Noxious weed.
quackgrass , couchgrass
Leaf Morphology: Glossary
Form: Grass-like
Arrangement: Alternate
Texture/ Venation: Soft flexible
Surfaces: Glabrous
Colour in Summer: Bluish, Green
Leaf(let) Terms:
Shapes: Linear
Apices: Acute
Bases: Sheathing
Margins: Entire
Additional Info: Leaves rolled in the bud.

Inflorescence Type: Spikelet
Flower Morphology:Flowers perfect
Number of Petals:0
Ovary Position:Superior
Colour (petals): Green-yellow
Flower Time at Peak: Jun, Jul, Aug
Additional Info: Spikelets flattened with 4 to 6 florets, alternately arranged along a common zig-zagged axis up to 15 cm long.

Fruit Type: Grain (caryopsis)
Fruit Colour: Brown
Fruiting Time:
Additional Info: burred, sharp awl
Bark or Stem Colour:
Organ Modifications: Rhizomes
Pest Susceptibility: Drought resistant
(TFL) Turf Field Lab
(TFLW) Turf Field Lab West
(WDY) WeeDY location
Location Map

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