Hi- I would have to say all hibiscus plants are safe. The names are given for different colored flowers they produce, I have pink, orange, and red hibiscus plants (flower color) and some also seem to have different shades of green in the leafs, there are allot more colors then what I have, but I just buy the basic ones from homedepot no fancy ones, what ever looks best, I buy. The most common one I would say is Hibiscus Rosa-Sinensis, I see it all the time at homedepot, and it is on the non-toxic list. It is similar to how there are different forms of ficus trees (leaf color and shape), I have about 3-4 different kinds of ficus trees, but once again I buy what looks good, when I need one or two or five. LOL. The umbrella trees are a little different, you can't use just any, the larger leafed umbrella trees are toxic (Schefflera actinophylla) and the smaller leafed trees are safe (Eriogonum Umbrellum, Schefflera arboricola). Hope this helps!
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John
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