The botanist Jan Willem Moll posthumously published Phytography as a Fine Art in 1934. He refers to Schopenhauer and included an English translation of a famous quotation:

In Schopenhauer’s Parerga und Paralipomena, there occurs a curious passage, in which we find clearly expressed the essential character of the method of pen-portraits. He says: “to the discovery of the most important truths the observation of the rare and hidden phenomena, only to be produced by experiments, does not lead; but rather the observation of the openly displayed phenomena, accessible to everybody. Therefore the problem is not so much, to see what nobody has yet seen, but rather to think concerning that which everybody sees, what nobody has yet thought.”