I know the design of the lily cut - I have admired and studied Christine's vase in Sunshine Amber.
Yes, p 141.
(it's not in the index, I have to rely on knowing it's the bottom of a right hand page and trawl through.)
Your piece looks as if it's more likely to be "Evergreen" (actually "Old Bristol Green", renamed), rather than "Spring".
The book doesn't mention Uranium in either of the greens, but does say the recipes came from Benjamin Richardson III.
(Edited for clarity - the BR III recipes were for the greens. the sunshine amber recipe was made from a Swedish formula brought over by Sven Fogelberg. All info from Hajdamach, 20th Century British Glass, p 140-141.)