The choyas propagate by clinging to the furr of animals, since we do not have furr the spines actually penetrate the skin and with the moisture the tip of the spine curls and anchors until the choya falls off, unfortunately the spines stay in the skin and take time to be brought to the surface, what ever you do stay away from them and if you do get them on you do go see a doctor, it urts like hell when stung, been there once, two of them on my head the rest on my winter jaket that got ruind getting them off, they will ruin bike tires.
navegator