I thought you might want to add a new plant to the host plant list, Dictamnus albus (Gas Plant) for the Giant Swallowtail. I had heard before that it's a host plant for them, and now this year I have firsthand knowledge of that. I found a Giant Swallowtail caterpillar on one of my gas plants. I found all of the other (25) eggs on my Ruta graveolens. I don't know if it's that they prefer the rue over the D. albus to lay their eggs on or if it's because the rue has much more foliage than the gas plants. The gas plants are only a few years old compared to the gas plants, which I just plant here in 2009. They're growing but are only about a foot tall with a few dozen leaves on each plant. They're definitely dwarfed by the rue. At least now I know for sure that they are used as a host plant, and they get beautiful flowers in the spring. TIA for adding.
Cathy
larry_gene
susanlynne48
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susanlynne48
larry_gene