Sue it's a form of Euphorbia. It's a tiny cultivar of Euphorbia leucocephala http://www.burkesbackyard.com.au/fact-sheets/in-the-garden/flowering-plants-shrubs/euphorbia-leucocephala/#.VLoKL9KUddw and I think it's known in the trade as "Diamond Frost " or similar They can sucker, and they will die down over winter, when you can cut those canes right back and hopefully your plant will re-shoot in spring. Euphorbias like those have a white, latex-like sap which is an irritant so be careful handling it and keep kids and animals away if poss. Here is a link that might be useful: link

Looks like a ZZ plant, Zamnioculcas zamifolia, but I've never seen one arching down like that. Does the pot have a hole? The Coleus also in the pot will want water more often than this plant. not really compatible to share the same pot.

You need a cutting or better yet, a division of it so you have roots ready to go. I got a division from my parents 30+ years ago (my grandmother's funeral) and I still have it today in a very small pot so it is constrained to grow and do as well as it can. Here is what mine came from. What mine looked like five years ago (I don't take many pictures of it after a few years). In tropical areas and planted in the ground, they become very large. Or even in a greenhouse in the ground. This next one is at a florist shop in metro Atlanta. They seem to be a landscaping plant in Florida, southern Texas, etc.

@Woodstock Mary...you don't say where you live, but there has been work (mostly by the renowned Dr Michael Dirr) to produce more hardy lantanas. Of course there is the old reliable Miss Huff (Z7-ish), but I'm not fond of the color combination in that one. It IS hardy for me...most winters, lol. Someone near me grows it on a steep bank, and theirs seems to do quite well even when mine doesn't. I think the key is superb drainage. But it seems like it takes mine a long time to make headway, even after a mild winter. What Dr Dirr has done is produce hardier varieties in multiple colors. The original was 'Chapel Hill Yellow', which I've grown since it was first released several years ago. It's still the prettiest to me, a pure, light yellow with no secondary colors. It's not *quite* as hardy as the followup varieties 'Chapel Hill Gold', ' Chapel Hill Apricot Sunrise', and 'Chapel Hill Sunny Side Up'. I've heard there's a mostly white one, but I haven't been able to find it. All of these are a good zone hardier than the old cultivars. Two other varieties I've seen but not tried are 'Sonset' and 'Mary Ann'. 'Sonset' is a classic yellow and orange; 'Mary Ann' is yellow and pink. I've seen them both at my local nursery. I *think* 'Mary Ann' is produced by Monrovia, so you should be able to find it. I know Plant Delights sells 'Chapel Hill Yellow', but they're kind of pricey, lol. I do love their selection of perennials, though. The other Chapel Hill types I've just run across at my local Home Depot and Lowe's. I don't think I've ever seen them for sale online, but a Google search would be worth it. Good luck with your lantana. They ARE variable in hardiness, so you might get lucky ;) John EDIT: I forgot to say that lantanas are very easy to root from cuttings. I ALWAYS take a couple of late summer cuttings of all the types I grow, just in case. I overwinter them inside on the window sill (along with salvias, begonias, brugmansias...you should see my window sills in winter. Then again, no, you shouldn't, lol). Some years I need them, others, I don't. Better safe than sorry.