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Winter Annual Grass Weed Seedlings

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  • Annual bluegrass
  • Hare barley
  • Italian ryegrass
  • Littleseed canarygrass
  • Longspine sandbur
  • Ripgut brome
  • Soft brome
  • Wild oat

Names link to more information on identification and biology.

Click on photos to enlarge
Annual grasses
Annual bluegrass seedling.
Annual bluegrass
(Poa annua): Grass family; winter annual or where irrigated a summer annual; leaf tip shaped like bow of a boat; membranous ligule rounded with slightly pointed tip; leaf blade crinkled at midsection.

Ripgut brome seedling
Ripgut brome
(Bromus diandrus): Grass family; winter annual; tubular sheath and soft (ciliate) hairs on margins of leaves and sheath distinguishes it from most other grass seedlings; membranous ligule is long, whitish, and jagged; no auricles present; dig down and check for the absence of a seed coat in comparison with the seed coat present on wild oat.

Soft brome
Soft brome
(Bromus hordeaceus): Grass family; winter annual, but some plants germinate in early spring; membranous ligules; no auricles present.

Seedling of Hare barley
Hare barley
(Hordeum murinum ssp. leporinum): Grass family; winter annual; papery ligule with long and narrow clasping auricles; hairy foliage.

Littleseed canarygrass
Littleseed canarygrass
(Phalaris minor): Grass family; winter annual; first leaves bluish green; large, white ligule inside the leaf blade where its base wraps the stem; leaf sheath with a reddish base; crown and primary root of seedling distinctly reddened.

				varnished appearance of ryegrass seedlings.
Italian ryegrass
(Lolium multiflorum): Grass family; winter annual; first blade erect, long, and narrow; leaves rolled in bud, blades with shiny, varnished appearance; ligule membranous; usually auricles present, but sometimes absent on very young seedlings.

Longspine sandbur
Longspine sandbur
(Cenchrus longispinus): Grass family; summer annual; seedling leaves are flattened, have a purplish tinge at the bottom; distinctive identification characteristic is the bur, from which the young plant emerges, found by digging carefully around the roots.

Wild oats seedling.
Wild oat
(Avena fatua): Grass family; winter annual; first leaves with small marginal hairs and counterclockwise twist when viewed from above; ligule large, papery, and pointed.

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