Sharon Bokan: Thistles — the good, the bad and the native

… thistle is either native or nonnative. Native thistles normally grow … stands like nonnative thistles.
Native thistles are usually shorter … thistle; Carduus acanthoides, and Canada thistle, Cirsium arvense or … (second growing season).
Canada thistle is harder to …… thistle is either native or nonnative. Native thistles normally grow … stands like nonnative thistles.
Native thistles are usually shorter … thistle; Carduus acanthoides, and Canada thistle, Cirsium arvense or … (second growing season).
Canada thistle is harder to …