Any plant from which bees usually collect nectar, pollen, or both for making honey.
A plant of the genus Melissa, especially lemon balm (Melissa officinalis).
A plant of the genus Hoya, especially the porcelainflower or waxplant (Hoya carnosa) from the tendency for excess nectar to drip from its flowers.
Bishop's weed or false Queen Anne's lace (Ammi majus).