All my early trips to France were at Easter and I now know that the tilleul generally doesn't burst into leaf until later, so I never saw them at their best.
1.1mass nounA tea made from an infusion of the flowers of the lime or linden tree, originally used as a remedy for headache.
椴树茶（原用于治疗头痛）
we finished the meal with two cups of tilleul
Example sentencesExamples
It is one thing to recommend folk remedies such as lime flower tea or tilleul to help people sleep at night and quite another to charge huge amounts of money for treatments which nobody has proved to work.
Origin
Mid 16th century: from French, from a diminutive form of Latin tilia 'linden'.