I have been photographing the spines on the trunks of Ceiba pentandra trees for several decades. I raised Ceiba when I was creating the Yaxha Parque Nacional in Peten. And today I raise Ceiba in the ethnobotanical garden surrounding our office.
But there are many more trees with spines than just Ceiba pentandra. So we have a long-range project to identify and then find and photograph each species. Below is a set of specimens that we located over the Christmas holidays (we work all holidays, as they are a convenient time to get out of the office and into the rain forests and fields).