Thank you Linda for your shedding some light on the question. I don't know how well Monarchs and Queens will take to this vine, because the butterflies have been so absent this year, but I have hopes. I did see Queens laying eggs on it and also saw a caterpillar later, but there were so few of them that the predators snatched them up right away.
I think that the mosquito spraying they have been doing around here has a lot to do with the lack of butterflies.
I have to say that I have raised Monarchs and Queens with the leaves from this vine, and they ate it just fine and grew to maturity without any problems.
In any event, maybe next year will be a better indicator and give us better clues.
