Andrew Barss wrote:

Non-carbonized bamboo is substantially harder than any species of oak.


See

http://www.woodfloorsonline.com/techtalk/hardns.html


A-ha!

Thanks, Andy.

I felt my BIL's bamboo floor was softer than typically used hardwoods,
but it's carbonized, with a color similar to light walnut.

Thanks again for the link.

Barry