Thanks Todd for a great review. Excellent photos also! I was wondering about the different species (environment, invasiveness, cut flower use) and you answered my questions. S. obtusa is showing up in the plant catalogues this year, or at least I have not noticed it before. Now, how wet is wet for S. obtusa? Occasional flooding, otherwise dry or does it need periodic irrigation like a home gardener would provide for bedding plants (more or less consistently moist soil?
Thanks much for this article. So timely -- I had read about burnet last week but when I went hunting for it over the weekend, I couldn't find it at the local garden centers and the staff hadn't heard of it. This article helps educate us all about a useful plant.
I have Sanguisorba tenuifolia 'alba' growing in a bed by my downhill driveway in Portugal Cove-St. Philip's (NL). I have had it for about five years now, and it is well-behaved. The foliage is interesting even if the very tall flower is not particularly showy. Grown originally from seed.