Emily Dickinson Lexicon

SCOR'PI-ON-GRASS, or SCOR'PI-ON'S-TAIL, n.

A plant of the genus Scorpiurus, with trailing herbaceous stalks, and producing a pod resembling a caterpillar, whence it is called caterpillars. – Encyc. The mouse-ear scorpion-grass, is of the genus Myosotis.