The leaves of Philodendron linnaei are moderately coriaceous (slightly leathery to the touch) and semi-glossy in sheen.
The very unusual thing about this plant is that it will occasionally grows runners. We have had 50+ of these plants and it's the first time we have seen it.
This is a very peculiar habit where there are two very distinct modes of growth. Once the runner finds somewhere suitable it will begin to grow in that location. You can then either leave it to grow or remove to form another plant.
We did consider keeping this plant and growing it up a large moss pole, allowing young plants to form in various places. However space is an issue so it has to go.