An article by W. George Schmid in
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
Georg Ahrends . They include
H. sieboldii (syn. H. albomarginata) 'Alba Improved',
H. ventricosa 'Superba',
H. tardiflora 'Hybrids'
and H. 'Elegans'."