E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Garden cress, botanically called Cardamine, a diminutive of the Greek kardamon, called in Latin nasturtium, sometimes called Nose-smart (Kara-damn, head-afflicting); so nasturtium is Nasi-tortium (nose-twisting), called so in consequence of its pungency.
When ladies smocks of silver white
Do paint the meadows with delight.
Called Ladies smocks because the flowers resemble linen exposed to whiten on the grasswhen maidens bleach their summer smocks. There is, however, a purple tint which mars its perfect whiteness. Another name of the plant is Cuckoo-flower, because it comes into flower when the cuckoo sings.