Photo by Dirk Bellstedt
Grown by Dirk Bellstedt
This is the blue form of S. johannis, which seems to be the dominant form in the wild. There is also a white form, which until recently was the more frequently seen in North America. The plant shown above was grown outside, in Prof. Bellstedt's garden. Another form with somewhat wider and differently shaped flowers has also been grown by Prof. Bellstedt.