That's what I think too. The brown leaf can't turn green again, plant would look better if you take that off, but glad you left it on for the pic to show what's going on. Looks like it has a toxic buildup of something in the soil, likely fluoride, to which this plant is very sensitive. Over time, some tap water can alter the PH of the soil also. Has it ever been repotted? The next time it's dry, I would flush the soil with a gallon of distilled (not bottled drinking water) or rain water if possible. Pour about 1/4 of the gallon on it, wait 15 minutes, pour another quart. Wait 15 minutes, then very slowly pour the last half gallon, all over the surface of the soil, not just in one spot. Then let it dry well before watering again. It likes very bright shade, but not much if any direct sun outside. In the house, some direct sun that's not during the middle of the day should be fine. Come on by the house plant forum if you have further questions or need instructions on repotting, best done during summer.

Doesn�t have any restorative properties. Like many other weeds, it will compete for nutrients just like any other weed. As far as I know, it isn�t overwhelmingly competitive. As far as pests and whether it attracts beneficial� yes, it does- Ladybugs. But that�s only because those in the mallow family are essentially aphid hotels. So, in summary, get rid of it.

Looks like H. rosa-sinensis, as several have stated. I don't see your location, but if you are in a cold-winter locale, you can probably maintain it indoors over winter. Give it as much sun as possible. Keep it evenly moist...never sitting in water, never bone dry. It will lose most leaves up to the tips due to lack of humidity, and watch for mites, too. Since it's a woody perennial, it will hang in there until spring, but look pretty bare. Once spring weather is settled and regularly above 50, it can go out on a deck or porch, gradually getting it used to full sun. Fertilize it regularly and keep it watered and grow it hard and fast to get buds and blooms before cold weather sets in again. I'm in Indiana and repeat that cycle annually for about ten big pots. Boy, do the leaves drop when they come inside! It is not a houseplant and will struggle if it's inside all year, though you may get a few blooms. Good luck with your plant. I love the tropicals and don't mind the work. Bob

Thanks for all your help! #1 does look like a Dischidia nummularia when I googled a pic, and #2 is definitely a Hoya Linearis! They are both growing very well and look great in my flat. I own a flower shop in London and ordered them a selection of mixed hanging plants through my supplier in holland, loved them so much I took them home. Have orderd some more for the shop now as the supplier thought the second was a type of senecio, thanks to you guys I put him straight