Pistachio

Winter annual weeds

ON THIS PAGE:
  • Burning nettle
  • Filarees
  • Hare barley
  • Little mallow
  • Mustards
  • Perennial fringed willowherb
  • Ryegrass
  • Shepherd's-purse
Click on photos to enlarge. Names link to more on identification and biology.
Burning nettle seedling.

Burning nettle

(Urtica urens): Nettle family; winter or summer annual; rounded seed leaves with smooth margin and small notch at tip; first true leaves with small notch at tip, opposite, stalked, and distinctly toothed.

Seedling of redstem filaree, Erodium cicutarium, at the two-leaf stage.

Filaree spp.

(Erodium spp.): Geranium family; seed leaves deeply 3- to 4-lobed, center lobe largest.

Several Hordeum species have long claw like auricles.

Hare barley

(Hordeum murinum ssp. leporinum): Grass family; papery ligule with long and narrow clasping auricles; hairy foliage.

Little mallow, Malva parviflora, seedling.

Little mallow (Cheeseweed)

(Malva parviflora): Mallow family; seed leaves heart-shaped, sometimes with red tinge; true leaves roundish with wavy, shallow-toothed margins.

Mustard seedling.

Mustards

(Brassica spp.): Mustard family; all mustard seedlings with broad seed leaves and deep notch at tip; first true leaves bright green on the upper surface and paler below.

Photo not available

Perennial fringed willowherb (Panicle willowherb)

(Epilobium ciliatum) Evening Primrose Family; seed leaves egg-shaped with a rounded to slightly squared tip and hairless; first true leaves oval.

Shiny, varnished appearance of ryegrass seedlings.

Ryegrass spp.

(Lolium multiflorum): Grass family; 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.

Shepherd's-purse seedling.

Shepherd's-purse

(Capsella bursa-pastoris): Mustard family; seed leaves pale green with tiny granules on surface; first true leaves with smooth margins; fourth and later leaves may be indented; true leaves covered with star-shaped hairs.

 

Top of page


Statewide IPM Program, Agriculture and Natural Resources, University of California
All contents copyright © 2014 The Regents of the University of California. All rights reserved.

For noncommercial purposes only, any Web site may link directly to this page. FOR ALL OTHER USES or more information, read Legal Notices. Unfortunately, we cannot provide individual solutions to specific pest problems. See our Home page, or in the U.S., contact your local Cooperative Extension office for assistance.

Agriculture and Natural Resources, University of California

Accessibility   /PMG/C605/m605pwinanweed.html revised: January 8, 2014. Contact webmaster.