Plants may need support ... Upright stems carry small, grey-blue, thistle-like flowers that sit on a broad, spiny ruff that ...

It gets its common name from being an attractive food for pigs, and for having a vague similarity in appearance while young to thistles, though doesn’t have spines like true thistles ... to the midrib ...

using a translocated herbicide like glyphosate to move into the forming seeds and prevent healthy seeds from being put back into the soil. Spot-spraying is another option for flowering plants, using ...

European marsh thistle, a terrestrial and wetland herbaceous biennial in the Asteraceae family, is an invasive plant that prefers moist soils ... and covered in spines often found with multiple ...

The Sacramento Mountains thistle is a rare purple flower than can grow to be six feet tall and lives only in wet, high-elevation habitats in the Sacramento Mountains near the town of Cloudcroft, New ...