i can try marimos if you need it,
Plant: Marimo moss balls
Scientific name: Aegagropila linnaei
Max Height of plant: said to be 8-12"; however, they grow at a rate of about .5 mm/year, so reaching this size would take decades.
Max width of plant: n/a
Leaf size: no leaves per se- a thick furry surface of tiny hairs
Minimum Lighting for growth: low
Color: bright green to dark green
Comments/suggestions on this plant: true marimos are not actually made of moss, but of a species of algae that grows in a spherical shape. some petstores sell other mosses as "marimo balls" that have been wrapped around a styrafoam ball (the ones i have seen have been java moss); look closely at its texture. if it's a true marimo it should look like a mat of short soft fur, no leaves or needles attaching to central stems.
marimos keep their shape by being rolled around in strong currents when grown in the wild, so if you want it to retain its round shape, you have to take it out & roll it between your hands every couple weeks- or you can let it flatten itself on to the substrate or a piece of driftwood. marimos also must be turned over occasionally to give both sides of the sphere time in the light, or the bottom will turn brown. being an algae, they are sensitive to algaecides and high doses of excel. they are a nice plant for even the most low-tech aquarium, but they absorb almost nothing in the way of nutrients, because they grow so slowly. to reproduce, break one marimo in to smaller pieces and roll them gently in your hands to make them round. keep in mind that it will take a very very long time for small marimos to grow though.
Picture? High res preferred!:
original resolution here if you need higher but it seemed like kind of overkill: http://imgur.com/AqSbTgM