I want to update you on this collection.
Dr. Karen Hughes (Univ. Tenn., Knoxville) has been kind enough to do some sequencing of this collection and other material of A. citrina f. lavendula from my herbarium.
I’ve begun to put up some bare bones background regarding Dr. Hughes recent study of material that was identified as A. citrina f. lavendula on the WAO site. There will be a lot more work necessary in order to start to work out what is going on. Any new information will be posted here:
The thing that first fascinated Dr. Hughes was that a goodly set of a “putative” lavendula from the Great Smoky Mountains National Park appeared to be members of a cluster of infraspecific hybrids. She and her colleagues have written a paper on the subject of infraspecific hybrids that is now in the review process prior to (hoped for) publication. Her hypothesis relating to lavendula is summarised very briefly on the techtab of the above cited page.
The two other lavender-staining-in-the-presence-of-cold, citrina-like taxa have very straight forward DNA showing minimal (if any) variation in key parts used for ID.
For the moment, Dr. Hughes has proposed a simple numbering for the taxa she has found; so I am simply going to use the names “sp-lavendula01,” “sp-lavendula02,” and “sp-lavendula03” for the three taxa. It happens that this guy (MO 81042) is “sp-lavendula02.”
So now we need to get full annotation of fresh material to try to develop macro and micro descriptions of the three taxa to see if we an separate them morphologically.
I don’t expect the process to be very fast; but it can be followed on the above page at WAO.
Thanks for the collection with the photo documentation. Nice find.