This is probably good information to post in your Florida Forum.
In the meantime, I'll do some digging to see whether the name's being disputed anywhere else.
As for the merge tool, I'd caution against using merge proposals. The system doesn't know the correct name and won't merge name information or plant data. It moves everything to the entry with the lowest number. In this case, it would be the S. bicapsularis entry. There were no photos or comments in the other entry, so the merge would only have accomplished one thing: The entry for S. pendula var. glabrata would have been lost, name and all.
The merge tool is really useful for merging photos, comments, and owner information, but it takes a lot of preliminary work to move names, synonyms, common names, plant data, etc. It's best left to the admins. Just shoot me a tree-mail the next time you want to merge some entries.