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Scientific Name: Lolium perenne
Pronunciation: LOW-lee-um per-EN-ee
Common Name: perennial ryegrass
Family Name: Poaceae
Plant Type: Herbaceous perennial, Poales (grass-like)
Key ID Features: Leaf vernation folded, blade v-shaped in cs, keeled, 2-5 mm wide, heavily veined and dull above, underside smooth and very glossy, tapering to a sharp and long pointed tip, margin smooth…auricles small, rounded…ligule 0.5-1.5 mm, toothed near tip…sheath smooth, glossy, and usually reddish at base…stem flattened…no rhizomes or stolons…bunching (tufted) habit. Field ID terms: shiny, glossy, folded, pointy-boat, ridged top, darker(?).
Course(s): not used (on campus)

Habit: Arching
Form: Vase
Texture: Fine
Mature Size:
Height:0.4 - 0.7m
Spread:0.3 - 0.6m
Growth Rate:Fast
Origin: Africa, Central / west Asia, Europe
Hardiness Rating: Zone 3: (-40 to -34 C)
Exposure: Full sun, Part sun/part shade
Soil/ Growing Medium:
Landscape Uses: Golf green
Additional Info: Google
perennial ryegrass
Leaf Morphology: Glossary
Form: Grass-like
Arrangement: Alternate
Texture/ Venation: Parallel venation, Soft flexible
Leaf(let) Terms:
Shapes: Linear
Apices: Acute
Bases: Sheathing
Additional Info: Leaves folded in the bud.

Inflorescence Type: Panicle-like, Spikelet
Flower Morphology:Flowers perfect
Number of Petals:0
Ovary Position:Superior
Colour (petals): Yellow, Green
Flower Time at Peak: May, Jun, Jul, Aug, Sep
Additional Info: Spikelets flattened with 6 to 10 overlapping florets, alternating on a common axis.
Fruit Type: Grain (caryopsis)
Fruit Colour: Brown
Fruiting Time:
Additional Info: 6-9 mm long; lemma square at apex; awns absent; rachilla flat and wide; 500 grains per gram

Bark or Stem Colour:

(TFL) Turf Field Lab
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