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Posts Tagged ‘state’

Black Henbane

Thursday, June 27, 2013 AT 02:06 PM

Hyocyamus niger

This is a biennial plant growing up to 3 feet tall.

Reproduces by seed.

Leaves are alternate, toothed, and shallowly lobed with a very foul odor.

Large flowers can be 1 to 2 inches in diameter. White to brownish-yellow in appearance with a
purple center and purple veins.

Fruits are pineapple shaped, about 1 inch long, and contain hundreds of tiny black seeds.

Black henbane was introduced from Europe as an ornamental. It has become an invader of disturbed sites in pastures, roadsides, fencerows, and waste areas. It can be toxic to livestock and is poisonous to humans. This plant is primarily found in the north-central areas of Natrona County.


Chemical control must be applied before bloom. Contact your local weed and pest for specific recommendations.


Cut down or dig up before seed production.

Skeletonleaf Bursage

Tuesday, June 25, 2013 AT 06:06 PM

Franseria discolor

This plant is a long-lived creeping perennial growing up to 2 feet tall .

Reproduces by extensive creeping rootstocks and seeds.

Leaves are alternate and deeply lobed and toothed. They have a smooth, green topside and a silvery-green underside covered in fine white hairs.

Flowers are small and inconspicuous on solitary branches.

The fruits are light brown burs with conical spines.

Skeletonleaf bursage is native to the plains region and grows in cultivated fields, ditches, and waste areas. In Natrona County it is mostly found in disturbed sites such as barrow ditches.


Chemical control must be done before bud stage. Contact your local weed and pest for specific recommendations.

Yellow Toadflax

Tuesday, June 25, 2013 AT 06:06 PM

Linaria vulgaris

This is a perennial plant growing 1 to 2 feet tall.

Reproduces by seed and extensive rootstocks.

Leaves are narrow, pointed at the ends, and 2 1/2 inches long.

Flowers are an inch long with a bearded orange throat and a spur, similar to a snapdragon.

Also may be called “butter and eggs”.

Yellow toadflax was introduced from Eurasia as an ornamental. It is very aggressive and can quickly displace desirable grasses. It is commonly found on roadsides, disturbed sites, and in ornamental gardens. It is not as big of a problem in Natrona County as Dalmatian Toadflax is, but it can be found in urban gardens and has the potential to escape and is very difficult to control. Pay attention to the scientific name on ornamental plants you are buying. Do not plant this!!!