Ginkgo biloba 'H. B. Leiden' syn. with Ginkgo biloba 'Heksenbezem Leiden' was discovered on the old specimen Ginkgo growing in Leiden Botanic Gardens in the Netehrlands as a witches broom.  It is a dwarf cultivar which forms a small branched plant which will eventually grow to be about 3 m high, slightly less in width.

Ginkgo biloba 'H. B. Leiden' syn. Heksenbezem Leiden'