Botanical study is a firm-favourite subject matter for drawing and printmaking.  Although a lot of my studies of tree detail (pine cones in particular) use drypoint etching techniques, I am now also starting to explore saline-sulphate etch onto aluminium plate.  Here are some of my more recent drawings and etchings. 

Pinus Strobus cone - saline-sulphate etch and aquatint

Larix decidua cone - drypoint etching

Malus domestica twig - drypoint etching

Tree trunk detail - pencil drawing

Dryopteris filix mas frond- saline-sulphate etch