I was inspired by Jane LaFazio to hand carve a pinecone stamp. I used my sketchbook to gather together some previous pinecone artwork and to sketch a few different kinds of cones. (This is just one small sample of all that I drew). I eventually decided on a Douglas-Fir cone. The Douglas-Fir isn't a pine and it isn't a fir either, but that's an entirely different subject, isn't it!
You can see the finished stamp here also. I used this ochre color to stamp out the cone as I proceeded. I use a light color so that I can still see the drawing on the rubber material.