(US) The common dittany, Cunila origanoides.

plural of sweet rush

sweet flag

The flowering plant Achillea ageratum.

A flower of the narrow-leaved varieties of a species of pink (Dianthus barbatus), as distinguished from other varieties called sweet william.

plural of sweet John

(literature) The genre of sweet savage romance.

(Canada, US, simile) Synonym of sweet as pie

A small sweet (candy), historically sold for the price of one penny

fennel bulb / fennel frond / (proscribed) Synonym of aniseed (“anise seed”)