Parallel Botany, by Leo Lionni (1977)
...this illustrated "non-fact" work is presented as popular science. It earnestly expounds the oddities of an elusive, frequently invisible, and wholly imaginary plant kingdom that coexists with botany as we know it.
Parallel plants exhibit "masslessness," seem frozen in time, lack internal structure, and generally collapse to dust at a human touch. Some defy the laws of perspective. When visible, their coloration tends to be "a gamut of blacks." The latest, still unclassified discovery is black but casts luminous shadows.
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