What is a Species?

Borges:

These ambiguities, redundancies and deficiencies remind us of those which doctor Franz Kuhn attributes to a certain Chinese encyclopedia entitled The Celestial Emporium of Benevolent Knowledge. In its remote pages it is written that the animals are divided into a. belonging to the Emperor b. embalmed c. trained d. pigs e. sirens f. fabulous g. stray dogs h. included in this classification i. trembling like crazy j. innumerable k. drawn with a very fine camelhair brush l. et cetera m. just broke the vase n. from a distance look like flies

Albach et al., "Piecing together the 'new' Plantaginaceae," American Journal of Botany 92 (2005): 297-315:

More later.