Teasel: Dipsacus fullonum
Teasel apparently was imported into the U.S. in the early to mid-19th century for use in wool processing. Here is an informative link.
To my eye, teasel looks best used as an occasional accent. Large stands lose something because the plant's unique, upward-reaching structure and reflective qualities are lost when too many compete for attention. They also become rather scraggly by fall, so I recommend cutting them to the ground before seeds mature. (Use gloves; they are covered with sharp prickels.) You can save one or two seed heads for limited planting.Teasel is a biennial, so in the first year you will see only low rosettes with prickly leaves, then in the second year they soar to six or seven feet. The plant dies after making seed, so you will need to sow seed every year to assure a continuing presence in the garden.
If you are not sure you can be vigilant, do not plant teasel.
James Golden