I know exactly how you feel, Kwie2011. When I stumbled up to that website, I think I suffered from sleep deprivation shortly thereafter, lol. I combed over as much of it as I could, trying to soak it all in. I was devastated when the original site stopped functioning. I thought all of Steve's knowledgeable information was lost to those of us online. You can't imagine how thrilled I was when I learned that the IAS had archived it. I'm always going back to read up on different sections whenever I get the chance. Seeing as how I live here in Arkansas, not too far from his "Exotic Rainforest," I plan on some day heading on up there to check it out for myself. As beautiful as the pictures are, I'm certain that they don't entirely do this place any justice. :)

Rhaphidophora tetrasperma is only distantly related to Monstera and Philodendron. It is from almost the other side of the world in SW asia, the others are from central and south america. Grow it in a good moist but not wet loose fast draining grow mix, Something like 50% - 60% shredded bark or pumice, with the rest equal parts peat and compost with a little charcoal tossed in, mix it all well and don't pack it down into the pot. Alot of folks here would recommend Turface but I've never used it so I can't give an opinion of it but I've been in the research greenhouses at MOBOT in St. Louis and they use a similar mix there and some of the plants grow in it for years. Than give it something to climb cuz it'll want to climb if you give it good growing conditions. By giving it a pole to climb it will attach its roots to that rather than something like a table leg or the molding around your windows. If you get roots that just stick out in the air you can either guide them as they get longer back into the potting mix to aid in feeding the upper portions of the plant, leave them to hang loosely or just cut them off. Ideally, humidity should be on the higher end of things but like most house plants it should be able to adapt somewhat to home conditions, Just don't let it dry out. I have for the last couple of years ran a humidifier and it makes a huge difference to both my plants and how I feel during the winter. Check out the link below for more info, it is not my site or a commercial site. Here is a link that might be useful: Rhaphidophora tetrasperma

I would say that it's a Monstera deliciosa too. Which some call a "Split-Leaf Philodendron." Even though it's not actually a philodendron at all, but a close relative. Mine was a juvenile when I first bought it, with only a few newer leaves having one split in them. These plants are native to the rainforest and climb up the sides of trees in search for brighter light. So don't be afraid to water them and give them more sunlight. That's why it's leaning so far to one side, in search of more sunlight. I place mine outdoors where it gets some direct sunlight in the mornings and evenings, but gets dappled sunlight/shade during the afternoons. I have it in a fast draining soil that doesn't hold on to a lot of water. So I keep it pretty well watered and don't let it dry out. Tho, when I bring it back indoors for the cold months, I cut back on watering somewhat, letting it dry out a little before watering it again. Here where I live in Arkansas, we have been constantly getting rained on, and rained on, and rained on, over and over all Spring long (sorry California), and my plants have been loving it. Here is a photo of mine that I took last year after repotting it. It has since began growing much larger leaves on it more than double the size in the photo. Which are still fairly small in comparison to how huge they can truly get. They don't call them monsters for no good reason, haha! Easily one of my favorite plants. :)

Now that i'm looking out saw some other plants that were sold as "mini monstera", but they were different from the one I have. These in the store had darker green, longer more elongated leaves, the leave splits more random looking? Could that be R. pertusa? I read in multiple places that Tetrasperma does not like to be dry. Mine seems uncomfortably wet so far, I think I will change the soil to something less soggy.