The Green Crypt (Cryptocoryne wendtii) is a great plant for the beginner. It is easy to care for and can tolerate low light conditions. It is also very interesting as the amount of light can determine the shapes and size of leaves and the plant itself.  Reaching a height of around 6″ it is normally used as a mid-ground plant, but in smaller nano or “pico” type tanks it can be used as a nice background plant as I do in my 2.5g tank.  This plant can take a variation of conditions and still prosper; pH from 6-8, soft to moderately hard water and low-high lighting. Regular fertilization and C02 will allow the plant prosper greatly, but it can also do great even in low light setups with no ferts or anything special. Truly a beginner friendly or “starter” plant no matter what kind of setup you have.