Robinia pseudoacacia (4809' N 1634' E)

Description:

2008.06.23: Austria, Vienna XXII. district, 152 m AMSL, heath (Lobau Heisslnde): bark 'ringed'.This is a method to effectively kill them (and the reason for doing so is that they enrichen soil with nitrogen which changes the soil forever - as they grow on nutrient poor soil which is home to many endangered species which dislike rich soil).R. pseudoacacia, when 'ringend', still tries to support its branches and leaves till the whole tree dies off, roots included. (With some other species this however does not work, as is the case for Alianthus altissima, another introduced and invasive species equally endangering heaths.)Trees which are felled though grow new shoots from their roots: so felling is not an option to preserve this heath biotope.Flowering in may/june.Common, invasive.German names: Gewhnlich-Robinie, Scheinakazie, Falsche Akazie.For ringing method cf. AGES