The leek is a pungent herb, similar to the onion. As an heraldic charge, it’s found in the canting arms (Italian porro) of de Poris, mid-15th C. [Triv 273]; but the leek was perhaps better known medievally as the (unofficial) plant-badge of Wales [Scott-Giles, The Romance of Heraldry, p.18]. (Modern heralds have recognized this usage officially.) The leek is palewise, bulb to base by default. See also fruit.
Annore Spicer bears: Argent, a leek within a bordure wavy vert.
Dewi Balch bears: Per fess argent and vert, a leek counterchanged.