As far as I can tell, this was the second in this series that started with tree cell slides in botany class in college. The series was my most popular, most are gone, either sold or given as gifts.
Cell Series 2000 #1, watercolor pen
Unframed (shrinkwrapped)...$500
I've never worked with watercolor pens before, maybe because they didn't exist. I thought I'd give them a try and was surprised by the vibrant colors. I started drawing cells from microscopes in botany class in college. The first was pine tree cells, most of the rest were imaginary. I imagine them having an autonomous life, and sometimes they escape their boundaries and become explorers.