About ten years ago I decided to plant some bamboo. Not knowing much about this I just liked the way bamboo looked. At the time I did not really know the difference between "running" bamboo and "clumping" bamboo. I thought oh good running it will propagate and multiply and I will have lots of bamboo.
In the picture below is a clumping "Buddha's Belly" and the way you can tell is that the stalk is perfectly round like a plastic straw.
Smooth stalk = clumping
Groove in the stalk = running
This bit of knowledge took me lots of research checking books reading etc. and finally this little Japanese lady at a nursery on Sawtelle showed me. Now you know.
BTW I have used bamboo fiber yarn and it was terrific very soft and easy to knit with. The uses for bamboo is endless.
Oh I know I said there would be nothing about knitting in this post but I could not help myself. This is the project I knit with bamboo fiber. I called it "Worms".