"Cells of Rumex c, containing raphides r. The cells are called Raphidian. The raphides are acicular or needle-like crystals forming bundles." — Encyclopedia Britanica, 1893

Rumex

"Cells of Rumex c, containing raphides r. The cells are called Raphidian. The raphides are acicular…

"The common sorrel is a meadow plant, slender in habit, with halberd-shaped, juicy, acid flavored leaves, and bearing whorled spikes of greenish-red flowers in summer."—Finley, 1917

Sorrel

"The common sorrel is a meadow plant, slender in habit, with halberd-shaped, juicy, acid flavored leaves,…