Grass Atlas

Explore grass in 3D.

Choose a grass. Turn the 3D model to see its blades, roots, runners, and seedhead up close.

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Preparing model data

Cool season

Annual Ryegrass

Lolium multiflorum · Winter overseed in Zones 7 to 10

Tap a number on the grass, or choose a part here.

What to notice

Blade tip

The very end of a blade can look pointed, round, or like the front of a tiny boat. This small shape helps tell grasses apart.

On this grassThe keeled blade is glossy underneath and usually coarser than perennial ryegrass.

Species details and sources

A fast-germinating cool-season annual used to keep southern lawns green through winter, then give way as warm-season turf returns.

Licensed field reference

No exact reference photo yetWe will not substitute a different species or an unverified lawn photo.

ID fingerprint

Rolled shoot
Long clasping auricles
Awned spike seedhead

Photos worth taking

Light, bright green — noticeably paler than perennial ryegrass or fescue
Coarser, glossy blades in fast-growing clumps; stand looks thin and uneven
Common as a temporary winter overseed on dormant warm-season lawns (green grass over brown base)

Model boundaries

The existing atlas description calls the seedhead awned, but the cited Penn State turfgrass source establishes only a spike type. Do not model awns until a reviewed model-specific source is reconciled.
Gloss on the lower leaf surface is lighting-sensitive and should be paired with vernation and auricle cues.

Blade: Medium (3-6mm)
Tip & shape: Flat with prominent veins, pointed tip, shiny back of blade
Surface: Smooth, glossy underside
Spreads by: Bunch-type (clumping)

Checked againstThe Cool-season Turfgrasses: Identification

Next: Care guideLearn how to grow Annual RyegrassMowing · Watering · Lawn problemsRead guide

A photo is a lead, not a diagnosis.Confirm blade, collar, growth habit, and seedhead traits before buying seed or choosing a grass-specific treatment.

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