Grafting growth in the vascular cambium. Occasionally, a so-called "graft hybrid" or more accurately graft chimera can occur where the tissues of the stock continue to grow within the scion. Such a plant can produce flowers and foliage typical of both plants as well as shoots intermediate between the two. The best-known example this is probably +"Laburnocytisus" 'Adamii', a graft hybrid between "Laburnum" and "Cytisus", which originated in a nursery near Paris, France in 1825. This small tree bears yellow flowers typical of "Laburnum anagyroides", purple flowers typical of "Cytisus purpureus" and curious coppery-pink flowers that show characteristics of both "parents".
HMS Laburnum (1915) the Easter Rising, an armed rebellion by Irish republicans against British rule, began. "Laburnum" was ordered to Galway to defend the port on 25 April, arriving there on 26 April. On hearing reports that a group of rebels were advancing on the port, the Captain of "Laburnum" ordered her to open fire, with 10 shells being fired in the direction of the rebels and at a road on the outskirts of the city. On 28 April, "Laburnum" escorted a transport carrying troops to Galway. On 8 February 1917, the passenger steamer was torpedoed by the German submarine WSW of Fastnet