The story
From lark + spur, so named for the spur's shape, which resembles the hind toe of a lark.
Etymology from Wiktionary, CC BY-SA 4.0.
larkspur
Today it means: A delphinium: any plant of the genus Delphinium, especially Delphinium ajacis and other plants of the subgenus Delphinium subg. Consolida Full definition →