Norbert

I claim: 1. A new variety of the parts thereof, of Tilia cordata named `Norbert`, as described and shown herein, that differs from other varieties by the unique combination of: (1) a tight, dense pyramidal crown with a straight single leader and maintaining this neat appearance with age; (2) strongly ascending branches, not two-ranked but forming a symmetrical limb scaffold laterally around the trunk; (3) bright green, shiny, leathery leaves that are moderately resistant to aphid colonization; (4) the close spacing of the leaves and buds on the lateral branches; and (5) rapid rate of growth with the trunk diameter increasing nearly twice as much as the species or other observed cultivars on young plants propagated by budding.