The "real' stoloniferous T. clusiana
penstemon (Mon, 30 Mar 2015 07:17:19 PDT)

No such thing as Tulipa clusiana var. clusiana or Tulipa clusiana f. clusiana exists in nature.

According to the Kew monograph, there is a species, Tulipa clusiana, stoloniferous, pentaploid, which exists in nature. As I said before.
Bob Nold
Denver, Colorado, USA