There is an image of this cultivar on the Hosta Library. From the photo on the HL website, it appears to be a large size hosta with dark green leaves and yellow medial (center) variegation. This non-registered cultivar was originated by Heinz Klose of Staudengärtnerei Klose in Germany.

Nomenclature changes recommended in the 1991 book The Genus Hosta by W. George Schmid and accepted by The American Hosta Society would update names as follows: H. x tardiana is now Tardiana Group.

White Bell.

An article by W. George Schmid in The Hosta Journal (1985 Vol. 16) states that, "In England, Heinz Klose obtained a number of H. sieboldiana x H. tardiana plants after Eric Smith left Hadspen House nursery. He is also actively selecting and propagating H. 'Semperaurea' seedlings...Named by him are several hybrid seedlings: H. 'Goldpfeil' ('Gold Arrow'), H. 'Weisse Glocke' ('White Bell'), and H. 'Zitronenfalter' ('Lemon Butterfly')...special cultivars with H. 'Sieboldiana' lines are: H. 'Blauglut' ('Blue Glow') and H. 'Blaue Wolke' ('Blue Cloud') which reminds one of H. 'Blue Heaven'...with his H. x tardiana...has named one H. 'Irische See' ('Irish Sea')...H. 'Nordatlantic' ('North Atlantic')..."