Noxious Weed Forb Major Rangeland Plants of Idaho

Noxious Weed (Forb) Major Rangeland Plants of Idaho: Noxious Weeds

Noxious Weed (Forb) Dyer’s Woad • Perennial • Introduced • Poor for Grazers • Poor for Browsers Flat topped seedhead Hanging clusters of green pods (dark brown to purple on maturity) “Idaho Weed Resources. ” http//www. uidaho. edu/weeds Lanceolate leaves; clasp at stem

Noxious Weed (Forb) Hoary Cress/Whitetop • Perennial • Introduced • Poor for Grazers • Poor for Browsers Terminal flowers Herbaceous (forb) “Idaho Weed Resources. ” http//www. uidaho. edu/weeds

Noxious Weed (Forb) Leafy Spurge • Perennial • Introduced • Fair for Grazers • Poor for Browsers Rhizomatous roots No flower petals; yellow bracts below flower

Noxious Weed (Forb) Poison Hemlock • Perennial • Introduced • Poor for Grazers • Poor for Browsers Flowers arranged in umbel Leaves highly divided; carrot-like ** Poisonous – This plant can contains a toxic alkaloid

Noxious Weed (Forb) Rush Skeletonweed • Perennial Yellow flowers • Introduced • Fair for Grazers • Fair for Browsers linear leaves on stem or dandelion-like leaves in rosette “Idaho Weed Resources. ” http//www. uidaho. edu/weeds

Noxious Weed (Forb) Spotted Knapweed • Perennial • Introduced • Fair for Grazers head characterized • Poor. Flower for Browsers by dark-tipped bracts Pinkish-purple flowers

Noxious Weed (Forb) Yellow Starthistle • Annual • Introduced • Poor for Grazers • Poor for Browsers Star-like spines at base of flower Taproot