Dracocephalum
(Initial Revision 2 Feb 2011)
Some books has warned that this is a highly invasive group of plant. The few plants I acquired or sowed are in no hurry to spread even after quite a few years. I think some species like Dracocephalum grandiflorum may be invasive (I have no experience with it). The plants I have are small and low, and have very nice bluish purple flowers. They appears to be particularly useful for rockery area.
Dracocephalum argunense v. japonicum?
I am not certain that the name is correct.

Dracocephalum argunense v. japonicum?
Dracocephalum wendelboii
Very hard to find information on this one in any of my books or internet.

Dracocephalum wendelboii
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Only two things are infinite; the universe and human stupidity, and I am not sure of the former.
- Albert Einstein
