I would guess Halberdleaf Rosemallow (Hibiscus laevis). Here's the profile from Lady Bird Johnson Wildflower center: http://www.wildflower.org/plants/result.php?id_plant=HILA2 Check out the Pavonia genus as well, Pavonia hastata looks similar.

Mahogany Splendor Hibiscus does fine here in the Houston area. I was given a gift of this plant last fall. Since then I have given away many cuttings which by the way start quite easily. But first they may lose their leaves or even wilt and look like they have died. I put 4 cuttings into my soil during our July weather here. I kept them well watered but they stayed wilted like they were dead until about one month later. I have also just stuck 5 more into my soil about 3 weeks ago and they are just starting to look healthy. I received them in the mail from Florida from a very nice member of gardenweb. They seem to take quite a while establishing their roots but if left alone they will take care of themselves. Those cuttings were about the size of a drinking straw but now the 2 cuttings I kept are larger than my thumb and they are both reach to above the bottom of my roof. They only seem to bloom in our cool weather so I do not expect to see blooms until around Christmas or maybe later. They bloomed last winter when our temps were in the 40's at night. Their leaves look more like Japanese red maples For me I have found to keep them about the size I like I have had to find homes for them more and more. Hope this is of some help Paul This post was edited by wally-1936 on Mon, Nov 18, 13 at 18:21

Purely a guess, but I would say yes, as the bottled lemon juice is more acidic than vinegar and it's already nearly at 50-50 with the two, which is comparable to the NCHFP recipe. Generally Better Homes & Gardens is reliable in its canning recipes and is one of the more cautious private sources, though I can't attest to 100%. Carol

I have Summer Storm and it definitely has dark leaves. I saw it for the first time when it was in a rather shaded part of the nursery and the leaves were green. I decided I didn't need another green hibiscus and passed it up. Later I learned it needed sun for the dark leaves. The large pink flowers really show against the dark leaves.