Where does “chardon béni” come from?

chardon béni (French) comes from French béni, from French bénir, from Old French beneïr, from Latin benedīcō, from Latin dīcō, from Latin -tiō, from Latin dissertātiō, from Latin dissertus — small stone, pebble; gravel, rubble.

Ancestry of “chardon béni”, step by step

chardon béni traces back through two separate lines of ancestry.

via French béni

Step	Language	Word	Meaning
1	French	béni	past participle of bénir
2	French	bénir	to bless
3	Old French	beneïr	alternative infinitive of beneïstre
4	Latin	benedīcō	to speak well of someone, commend
5	Latin	dīcō	to say, talk, speak, utter, mention
6	Latin	-tiō	tion, -ation, -ing
7	Latin	dissertātiō	(spoken) dissertation, discourse, disquisition
8	Latin	dissertus	arranged, disposed; explained
9	Latin	disserere	second-person singular future passive indicative...
10	Latin	dis-	asunder, apart, in two; reversal, removal;...
11	Latin	calceus	shoe
12	Latin	calx	limestone; chalk; the finish line
13	Ancient Greek	χάλιξ	small stone, pebble; gravel, rubble

via French chardon

Step	Language	Word	Meaning
1	French	chardon	thistle; spikes
2	Latin	carduus	a wild thistle; the artichoke
3	Proto-Indo-European	ḱers-	to run

Every word from Ancient Greek χάλιξ →Every word from Latin -tiō →Every word from Latin dis- →