corn salad

WordReference Random House Unabridged Dictionary of American English © 2025

corn′ sal′ad, 

1. Plant Biology any of several plants of the genus Valerianella, of the valerian family, esp. V. locusta (or V. olitoria), having small light blue flowers and tender, narrow leaves eaten in salads. Also called lamb's lettuce, mache. 

• 1590–1600

Collins Concise English Dictionary © HarperCollins Publishers::

corn salad noun

1. any valerianaceous plant of the genus Valerianella, esp the European species V. locusta, which often grows in cornfields and whose leaves are sometimes used in salads
   Also called: lamb's lettuce