More often than not, plant anatomy is the specialized purview of a trained botanist. Consider the poppy. What does the poppy's internal structure look like during seed maturation? Or the fern—how are the sporangia assembled, when examined from the perspective of the leaf?
Steven N. Meyers is not a botanist, but his photographs might suggest otherwise. Trained as a medical X-ray technologist, Meyers has applied radiography techniques to botanic specimens, capturing the details, and structural relationships of a plant that are otherwise unseen.
