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

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

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

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

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

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

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

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