Use precise geolocation data. Actively scan device characteristics for identification. Store and/or access information on a ...

Bull thistle starts out life as a prickly ground-hugging rosette that, in the summer, puts out tall, equally spiny stalks topped with purple flowers. Later, fluffy white seed heads form.

Soil Conservation Technician When I moved into this new house, I was thrilled to see a large planted flower bed in the backyard. All spring I imagined what beautiful flowers would soar up and ...

European marsh thistle frequently invades fens, wetlands, and disturbed sites such as roadside ditches. Identifying features include: typically grows 2-7 feet tall leaves are alternate with deeply ...

Slender winged thistle has less, with about 1-3 heads per stem. The winged thistle has spiny strips of leaf material up its stems, and these are known as wings, hence the name winged thistle.

Canada thistle is a colony-forming perennial from deep and extensive horizontal roots. Stems are 1 to 4 feet tall, ridged, branching above. Leaves are alternate, lacking petioles, oblong or ...

As with most thistles, Scotch thistle decreases animal production by reducing the amount of pasture that livestock are prepared to eat as they avoid eating grass beside the spiny leaves, and also the ...