1) Leaf stems 2) Leafstalks 3) Leakstalks 1) Stems 
petiole, petioles 1. The slender stem that supports the blade of a leaf. 2. A stalk or peduncle, that connects the abdomen and thorax in wasps. 3. Etymology: Latin petiolus, variant of peciolus, 'little foot, fruit stalk', probably from pediciolus, diminutive of pediculus.