þistel

Old English þistel comes from Proto-Germanic *thistilaz, of uncertain further origin. The word has cognates across Germanic languages: German Distel, Dutch distel, Old Norse thistill. The common thread is the thorn — the thistle is, above all else, a plant that stabs. Every attempt to handle it, eat it, or plow through it comes with punctures.

The thistle became Scotland's national symbol, according to legend, when a Norse raiding party attempted a night attack on a Scottish camp. One barefoot Viking stepped on a thistle and cried out in pain, alerting the defenders. The story is traditionally placed at the Battle of Largs in 1263, though the timeline does not quite match. Historical accuracy is beside the point. The legend made the thistle Scotland's protector.

The Order of the Thistle, Scotland's highest order of chivalry, was established (or re-established) by James VII in 1687. Its motto is 'Nemo me impune lacessit' — 'No one provokes me with impunity.' The motto could be the thistle's own. The plant that hurt the Viking became the emblem of a nation that does not forgive easily.

Thistles (especially species of Cirsium, Carduus, and Onopordum) are among the most successful weeds on earth. They thrive in disturbed soil, resist grazing, and spread aggressively. In agriculture, they are a nuisance. In ecology, they are a primary food source for goldfinches, bees, and butterflies. The plant that nations try to eradicate turns out to be feeding the pollinators they need.