I just purchased this from a local nursery. The cultivar name on the tag is 'Blue Dragon', but since they also printed the species name as D. ruyschianUM, I wonder if they could have 'Blue Dragon' (a cultivar of a different species of Dragonhead, listed in this database) confused with 'Blue Moon' (a listed cultivar of this species).

At any rate, the foliage is low growing, with small rosettes of leaves arising from long stems or stolons. To me, it looks like a similar habit to a low-growing sedum or to carpet phlox. From what I can see, with the stems and leaves extending several inches beyond the rim of the gallon nursery pot, I would call it "mat forming." Time will tell how far/quickly it spreads.

There were several dried, papery seedpods in clusters at the ends of some of the stems when I purchased the plant (in October). I got at most one small (1mm?), hard, not quite round seed from each pod, although it's possible additional seeds had already been dropped.

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