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  An article by Warren I. Pollock in
The
Hosta Journal (1985 Vol. 16) states that, "In a private
garden in Uppsala, Sweden, Hylander found a hosta that he named H. fortunei 'Obscura'...Hylander
didn't explain why he selected the name "obscura," but I would guess that it
refers to the hosta's obscure origin...In the same garden Hylander found a
handsome yellow-margined form...he named H. fortunei 'Obscura Marginata'...in
Europe, it is called H. fortunei 'Obscura Marginata' and also H. fortunei
'Aureo-marginata', although in Britain the names 'Yellow Edge' and 'Sprengeri'
have been used on occasion
...In the U.S., this hosta goes under three names: H. fortunei 'Obscura Aureo-marginata', 'Aureo-marginata' and 'Golden (or Gold)
Crown'. I was told by one nursery that they sell the same hosta under any of
these names."
  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. fortunei 'Obscura' is now H. 'Fortunei Obscura'
and H. fortunei 'Obscura Aureomarginata' would be H. 'Fortunei Aureomarginata'
To summarize all of these name changes:
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1) H. fortunei 'Obscura'
= H. 'Fortunei
Obscura'
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H. fortunei 'Obscura
Marginata' = H fortunei 'Aureo-marginata' = H.
'Yellow Edge' or H. 'Sprengeri' = H. fortunei 'Obscura Aureo-marginata'
= H. 'Golden (or Gold) Crown' = H. 'Fortunei Aureomarginata.
  According to
The Hostapedia by
Mark Zilis (2009), "...long-established cultivar, commonly known as H. fortunei
aureo-marginata defined by Hylander (1954, p. 393) who
listed it as H. fortunei var. obscura f. marginata;
{registered by The American Hosta Society in 1987 as H.
fortunei 'Aureo-marginata' (Eisel 1988); name revised to
'Fortunei Aureomarginata' by Schmid (1991, p. 52); sold
as 'Gold Crown', Golden Crown', and H. fortunei
'Yellow Edge'..."
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