Rivieriorum Dwarf Clump Bamboo. This dwarf, clump-growing bamboo will reach 8-10’ with dainty stems and fern-like leaves. It has the same characteristics of its parent Bambusa multiplex. As others in this genus, it makes a wonderful container plant for indoors or out as long as it gets the proper amount of light. Like all true bamboos, it is a true grass. It is foliage hardy down to the mid-teens, and even when the foliage is burnt from severe cold, most culms will leaf back out the next spring. Periodically remove the oldest culms all the way to the ground.