There is a 63cm tall opaline vase in a similar shape (i.e. trumpet, tall, looks like a lily vase but it's not the same design as yours and is white opaline) in Das Bohmische Glas Band III page 54 plate III.52. It's by Neuwelt and dated c.1860.
If so then possible candidates could be Schachtenbach (green opaline shown on page 161); Neuwelt (green opaline shown on page 55)
I should think there might have been other makers as candidates as well but those were just two I found on a quick look in that book.
(and now I've decided that an antique lily vase is a must-have! I love lilies

)
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