The image you have came from the Field Museum obviously. In trying to look for plans or a source as to what the floor was made of I found a "case study" from the manufacturer that talks about the wood used in the exhibit. The quote from the site reads like an ad but it does talk about the flooring specifically used.
The exhibit also features PlybooStrand (Neopolitan) for the flooring. Plyboo was a perfect fit for this exhibit, as it comes from the Moso bamboo forests of China. A sustainable building material, it is made from 100% FSC-certified bamboo, which is rapidly renewable and free of urea formaldehyde. Plyboo is also extremely durable, an important consideration for such a heavy-trafficked environment.
It was easy after that to find the product page for the flooring quoted.
Image of PlybooStrand Neopolitan from plyboo.com
And as Treow Wyrhta's answer shows this is not wood but an engineered wood product. So in this case there is no grey area about the wood in question.