Index / Search / Lolium rigidum

§1 Plant

Lolium rigidum Gaudin

vernacular Wimmera ryegrass — species · Poaceae

USDA: LORI
GBIF: 2706218
Rank: species

Wimmera ryegrass (Lolium rigidum) — Platephotograph · Christian BergCC BY source · iNaturalist ↗

§2Habit & range

Growth habit: Graminoid
Duration: Annual
Group: Monocot
Family: Poaceae Barnhart
Genus: Lolium

§2a

Native status, by region

CAN Canada Introduced
L48 Lower 48 States Introduced

§2b

County-level range

· 2 counties across 2 states/territories

Legend Native · 0 Introduced · 2 Both · 0 Hover a county for detail.

§3Cultivation specs · USDA

Recorded by the USDA Plant Materials Program.

§3a

Tolerances

Drought: Low
Shade: High
Moisture use: High
Fire: Low
Salinity: High
Anaerobic: None
CaCO₃: Medium
Hedging: None

§3b

Climate & soil

Cold tolerance: 12 °F minimum
Frost-free days: 200 min.
Precipitation: 15–60 in/yr
pH range: 5.5–7.5
Root depth: 10 in min.
Fertility need: High
Soil texture: coarse, medium, fine

§3c

Form & growth

Growth form: Bunch
Growth rate: Rapid
Mature height: 3.5 ft
Foliage texture: Medium
Foliage colour: Green
Porosity (summer): Dense
Porosity (winter): Porous
Flower colour: Yellow
Fruit colour: Brown
Fire resistant: No
N fixation: None
Toxicity: None

§3d

Reproduction

Bloom period: Early Spring
Seed abundance: High
Seed begins: Spring
Seed ends: Spring
Spread rate: Slow
Stratify: No
Seeds / lb: 217,000
Propagation: seed

§3e

Use & availability

Commercial availability: Routinely Available
Nursery stock: No
Browse palatability: Low
Graze palatability: Medium
Palatable, human: No
Protein potential: Medium
Lumber: No
Christmas tree: No

§4Counties, by state

Recorded in 2 counties across 2 states/territories.

Arizona view state ↗ 1 I ▾

Mohave 04015

Louisiana view state ↗ 1 I ▾

Jefferson Davis 22053

§5Sources & provenance

USDA PLANTS

Symbol, taxonomy, distribution, cultivation specs, native status. Public domain.

plants.usda.gov/LORI ↗

GBIF Backbone

Canonical taxonomic identity, synonym resolution, cross-refs. CC0.

gbif.org/species/2706218 ↗

Record version

Cached and built locally. Source version on this record:

usda-plants-mt-2026-05-26

fetched 2026-05-26T07:25:30Z