Silver lime (Tilia tomentosa).
“An infusion made from the flowers of T. tomentosa is antispasmodic, diaphoretic and sedative. This may be attributable to the presence of pharmacologically active ligands of benzodiazepine receptor.
A widespread belief is that the nectar of this species contains mannose, which can be toxic to some bees. This is incorrect; the sight of numerous comatose bees found on the ground at flowering time is rather a result of the paucity of nectar sources in late summer in urban areas.
This species, while fragrant in spring, drops buds and pollen during the spring and fall. It is not a good sidewalk tree for that reason, requiring frequent street cleaning.”