The concept behind these is the same that characterised Matisse’s Bergsonian experiments with Prichard. The process of experiencing the “durée” of the subject in the practice of its illustration gives expression to its inner nature. The similarity to the Anthroposophical practice of experiencing through “intuition” a subject’s “etheric” is unavoidable.
Kelly’s illustrations here possibly even go further than Matisse, where Matisse could perhaps be described as expressing a more generalised spirit which emanates from all subjects, the line here is very particular to each individual plant, expressing more fully their own unique qualities.