Cultural Problems

In the past 10 years that I've grown Erythronium americanum, all it ever does is make leaves, never a single flower in all that time. The diffusely mottled fleshy foliage is delightful, the rhizomes spreading the colony around, but I want flowers! I noticed today it is starting to spread into my lawn.

It is planted in sloped bed under a Magnolia tree where I have lots of trillium species, cyclamen, and a tiny Viola species. The Erythronium and Viola are benign spreaders, too small to harm the commingling Trillium and Cyclamen.

Well, I don't know if this is actually a "cultural problem" as yet, but it seemed as though it might possibly be the right forum to ask the following question:

Are Saussurea, in general, deciduous plants? Does anyone know if Saussurea nepalensis, in particular, is deciduous herbaceous? I guess I'm looking for a spoiler.. can't wait until things actually start growing (or don't) here. ;) Hint, hint - I'm hoping someone can confirm that it is deciduous herbaceous, but I'll accept the alternative, of course, if not!!