horseweed

Now, Roundup-resistant weeds like horseweed and giant ragweed are forcing farmers to go back to more expensive techniques that they had long ago abandoned.

Round-Up Resistant Weeds Pose a Threat to Farmers | Impact Lab 2010

But now, as nasty invaders with names like pigweed, horseweed and Johnsongrass develop immunity to the mighty Roundup, chemical companies are dusting off the potent herbicides of old for an attack on the new superweeds.

Superweed Outbreak Triggers Arms Race 2010

Grey lichen grew on the cabin logs and dried stalks of horseweed and pigweed and fleabane rose from the snow in the doorways.

Cold Mountain Frazier, Charles, 1950- Cold Mountain 2003

Grey lichen grew on the cabin logs and dried stalks of horseweed and pigweed and fleabane rose from the snow in the doorways.

Cold Mountain Frazier, Charles, 1950- Cold Mountain 1997

Farther south, in the southern needleleaf region, the transition from old field to forest begins with crab grass and annuals, proceeds to horseweed followed by broomsedge, and culminates in a seeding-in of pitch, longleaf, slash, loblolly, or shortleaf pine.

The Field Guide to Wildlife Habitats of the Eastern United States Janine M. Benyus 1989

Farther south, in the southern needleleaf region, the transition from old field to forest begins with crab grass and annuals, proceeds to horseweed followed by broomsedge, and culminates in a seeding-in of pitch, longleaf, slash, loblolly, or shortleaf pine.

The Field Guide to Wildlife Habitats of the Eastern United States Janine M. Benyus 1989

Farther south, in the southern needleleaf region, the transition from old field to forest begins with crab grass and annuals, proceeds to horseweed followed by broomsedge, and culminates in a seeding-in of pitch, longleaf, slash, loblolly, or shortleaf pine.

The Field Guide to Wildlife Habitats of the Eastern United States Janine M. Benyus 1989

He came out upon the road slowly and stopped there, switching his legs absently with the stalk of a horseweed.

The Escape of Mr. Trimm His Plight and other Plights 1910

In the case of the Canadian horseweed or _Erigeron canadensis_, which is widely naturalized in Europe, the tallest specimens are often twenty-five times as tall as the smallest, the difference increasing to greater extremes, if besides the main stem, the length of the numerous branches of the tall plants are taken into consideration.

Species and Varieties, Their Origin by Mutation Hugo de Vries 1891

Gravel root; horseweed; knotweed; Canadian collinsonia.

Resources of the Southern Fields and Forests, Medical, Economical, and Agricultural. Being also a Medical Botany of the Confederate States; with Practical Information on the Useful Properties of the Trees, Plants, and Shrubs 1863