DaisyI said: 
to NGA
3. Black Bamboo is a clumping bamboo, not a running bamboo.
I believe Black Bamboo is a running type.
"The common Running Black Bamboo (Phyllostachys nigra) is not a bad choice; except that it's invasive,"
http://www.bamboowholesale.com...
Amazingly, some misinformed sellers still refer to P. nigra as Clumping Bamboo due to its circumstantial growth habits.
http://www.shweeashbamboo.com/...
