Laburnum alpinum aka Scotch Laburnum

Laburnum alpinum, also known as the Scotch laburnum, Scottish laburnum, or alpine laburnum, is a deciduous tree belonging to the leguminous family (Leguminosae). This small tree has pendulous branches, giving it a graceful appearance, and it produces racemes of vibrant yellow flowers in late spring. Similar to Laburnum anagyroides, it can reach a height of 5 meters (16 ft) and a spread of 6 meters (20 ft), growing at a fast rate. This species is hardy in zone 5 and blooms from May to June, with the seeds ripening from September to October. The panicles of flowers emit a pleasant vanilla scent and are hermaphroditic, attracting insect pollinators. The fruit takes the form of pods or legumes, initially green but turning shiny black as they mature. While the leaves possess cholagogue and purgative properties, it is important to note that all parts of this plant are highly toxic if consumed in large quantities and should never be ingested or used internally.