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) of Ireland with the loss of 32 lives. "Laburnum" was one of several ships, also including the seaplane carrier and the sloops and , to go to "Hesperian"s aid. Attempts to tow "Hesperian" to port failed, with the stricken liner sinking on 6 September. The sinking of the "Hesperian", which occurred despite an assurance to US President Woodrow Wilson from the German Chancellor Theobald von Bethmann-Hollweg that no passenger liners would be sank without warning, provoked protests from America that resulted in the submarine campaign against merchant shipping in British waters being suspended for several months. On 24 April 1916,