"Self-heal. (Prunella vulgaris). The upper part of the stem with flowers. a, the calyx; b, the corolla; c, a leaf; d, a bract from the inflorescence." -Whitney, 1911

Self-Heal

"Self-heal. (Prunella vulgaris). The upper part of the stem with flowers. a, the calyx; b, the corolla;…