In the taxonomic system, the grapevine is assigned to the subclass Rosidae (rose plants), the order Vitales (grapevine species), the family Vitaceae (grapevine plants) as well as the genus Vitis (see Weinrebegrapevine systematics). It is a creeping plant that originally climbed up trees. A grapevine can reach enormous dimensions and in extreme cases can reach an age of over 300 years. The morphology is divided into three main organs: roots, shoot axis (stem with shoots) and leaves. The entire root system lies underground, the largest part of it at a depth of 20 to 50 centimetres, which of course depends strongly on the type of soil. This anchors the vine in the soil and provides it with all the necessary nutrients and water.