Complex sentence: In "S. opuntioides", young segments may be relatively flat, being long by wide, but only up to thick, but the segments become more cylinder-shaped as they age, as well as becoming more woody.
Split into simpler sentences: In "S. opuntioides", young segments may be relatively flat, being long by wide, but only up to thick. The segments become more cylinder-shaped as they age, as well as becoming more woody.