Sulphur Queen
David Nicholson (Mon, 05 Jul 2010 01:08:51 PDT)

Jim McKenney wrote

<Patrick Synge in Collins Guide to Bulbs (early 1960S), attributed the name
to van Tubergen and uses the spelling "sulphur". >

Sulphur is the normal English spelling of the word I doubt that that the
spelling "sulfur" is used anywhere else other than USA.

David Nicholson
in Devon, UK. Zone 9b