Canada thistle (Cirsium arvense) may sound friendly and indeed it has a lovely purple flower, but gardeners and landowners know better. This prickly perennial weed is a menace and is listed as a ...

Protect your garden and lawn by attacking invasive thistle. These weeds thrive in hot summer weather, so it is essential to prevent their spread.

From the asteraceae family and originating from Europe, Canada thistle (Cirsium arvense) is my least favorite of all wildflowers. With pale, lilac clustered flowers, measuring 0.5 inches to 0.75 ...

• Canada/creeping thistle (Cirsium arvense) commonly found in lawns, gardens and disturbed areas. It has a waxy green leaf and a formidable rhizomatous root system.

Canada thistle (Cirsium arvense) is a creeping perennial broadleaf that is native to the Mediterranean area. It spreads rapidly through underground stems called rhizomes and by producing seeds. It ...

Canada thistle (Cirsium arvense) is a creeping perennial broadleaf that is native to the Mediterranean area. It spreads rapidly through underground stems called rhizomes and by producing seeds. It ...

Two classes from Rossland Summit School (RSS) collaborated with CKISS in identifying and removing invasive plants at the Jubilee Wetland. Activities included pulling Canada thistle (Cirsium arvense) ...

Canada thistle (Cirsium arvense) is an aggressive, invasive plant. Here's how it spreads and how to identify it so it doesn't take over your garden.

In Illinois, there are several species of invasive thistles, including Canada thistle, Cirsium arvense; bull thistle, Cirsium vulgare; and musk thistle, Carduus nutans. These are all considered ...

Two black swallowtail butterflies, Papilio polyxenes, drink nectar from Field Thistle at Heritage Park in Champaign. Griesbaum Griesbaum Two black swallowtail butterflies, Papilio polyxenes, drink ...

The gurus of native plant restoration who make up the Friends of the Meadow asked for help freeing the carefully chosen and community-planted native plants from a growing infestation of Canada thistle ...