kidfishing said:H. Dumorterii
This is a heritage cultivar that was brought to Oklahoma by my great grandmother during the land run of 1889 and we still grow it today.
They never knew what it was and just called it old and early.
That's great you are still growing it and have identified it. Did she bring it to Oklahoma from a colder climate or a warmer one or one that was similar? Since it blooms so very early, in my mind it would be logical that it came from a place where it wouldn't be subject to being caught by late freezes following some warm stretches that push it to start blooming. That would be fairly common where you are, I think. Or it may have adapted by lots of rebloom as a safety for making seeds. Does it do that? I'll Google the species and see what it tells me about its' origins, but that won't cover whence your grandmother toted it along to its current home.