Thanks, Marilyn!
Yes, Stachytarpheta mutabilis was one I was looking at, too. Thunbergia battiscombei was another.
Someone gave me a Stachytarpheta mutabilis at a trade years ago and the hummingbirds loved it here too (and I loved the color!) I managed to over-winter it for a few years inside but then lost it. I actually have some old seeds somewhere around here, but they take a while to flower from seed. I currently have a purple Stachytarpheta that I overwintered in the garage and a brand new baby red Stachytarpheta sanguinea in my foyer hiding from the cold. I thought I lost my little S. sanguinea yesterday when the cold front rolled in. It only got to 46F but the S. sanguinea shriveled up like it was dead! After many hours inside, it has finally recovered. I was lucky to find the purple and red at the UGA Trial Gardens sale for $10 and $5, respectively, in gallon pots and best of all... no shipping!
I'm still kicking myself for not picking up a pot a Pentas lanceolata 'Nova' that they had for sale. It was a bit pricey and I wasn't familiar with the name so I passed. Well, it turns out it was exactly what I wanted because it is one of the tall, old-fashioned Pentas that actually attract the pollinators. They are so hard to find too!
Sigh....hopefully they'll have it next year...