An article by W. George Schmid in The Hosta Journal (1985 Vol. 16) discusses the University of Munich's trial gardens, Staudensichtungsgarten Weihenstephan, which has "...a fine collection of hostas. These are of great importance from an historical standpoint, because many of the cultivars there came from the early German hybridizers, including Georg Ahrends . They include H. sieboldii (syn. H. albomarginata) 'Alba Improved', H. ventricosa 'Superba', H. tardiflora  'Hybrids' and H. 'Elegans'."