I collected some fir cones when I was out for a walk the other day. I like them as a drawing subject. They have fascinating patterns and shapes. I like the challenge of capturing all the detail and have to really concentrate to record them accurately.
If it is warm they will open up and then make it difficult to finish the drawing as all the shapes and patterns will have changed. So I try to finish them in one go or at least sketch out all the details before this has chance to happen.
This pair of cones is a favourite drawing which I did a while ago. It is done using a HB pencil. Press for larger picture.