Introduction
Black Henbane
Buffalobur
Canada Thistle
Common Crupina
Dalmatian Toadflax
Diffuse Knapweed
Dyer's Woad
Field Bindweed
Hoary Cress
Johnsongrass
Jointed Goatgrass
Leafy Spurge
Matgrass
Meadow Hawkweed
Meadow Knapweed
Milium
Musk Thistle
Orange Hawkweed
Perennial Pepperweed
Perennial Sowthistle
Poison Hemlock
Puncturevine
Purple Loosestrife
Rush Skeletonweed
Russian Knapweed
Scotch Broom
Scotch Thistle
Silverleaf Nightshade
Skeletonleaf Bursage
Spotted Knapweed
Syrian Beancaper
Tansy Ragwort
Toothed Spurge
Yellow Starthistle
Yellow Toadflax

Idaho OnePlan recommends the website of the Idaho Weed Awareness Campaign as the best resource for up-to-date information about Idaho's noxious weeds, and their control.
Source for this page: Idaho's Noxious Weeds by Robert H. Callihan & Timothy W. Miller

BACKGROUND

Rush skeletonweed (Chondrilla juncea) is a native of Eurasia. It generally prefers well-drained, light soils. The plant spreads primarily by seed, but roots scattered by cultivation can aid in spread.

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DESCRIPTION

Rush skeletonweed is a perennialPlant that lives for more than 2 growing seasons whose branched stems may be 4 feet tall and superficially appear leafless. BasalAt the base of plant or plant part leaves form a dandelionlike rosetteA circular, normally basal, clump of leaves that withers as the flower stem develops. Stem leaves are narrow and up to 4 inches long. The lowest 4 to 6 inches of the stem is covered with coarse brown hairs. Stems and leaves both produce a milky latex. Yellow flower heads are ¾ inch in diameter and are scattered among the branches from midsummer to fall. The seed is ribbed and bears a soft, white plumeA hairlike or featherlike structure, often on a seed.

DISTRIBUTION

Rush skeletonweed infests several million acres in the Pacific Northwest and California, including these Idaho counties.

CONTROL

Biological control agents (a stem/leaf rust, a bud gall mite, and a stem/leaf gall midge) are available, occasionally providing good control west of rush skeletonweed. Herbicides, if applied consistently each year, can control this weed after 3 to 5 years. .