Flor Tabú (Forbidden Flower) has deep roots in Harrison’s early career. Its story began as part of Cabanga, the novel Harrison wrote in Costa Rica in 1976, before becoming a comics script in 1989. The first version, titled Mimí Tamales de Cerdo (Mimí's Pork Tamales), was drawn in black and white and published in three chapters in the Chilean magazine Bandido in 1990. For European publication Harrison substantially rewrote and redrew the story, producing the much more explicit colour version.

The central character is Flor, who lives with her sister Marielos and their mother Mimi. Tenniel  ‘Tenny’ Dodgson, the Chilean psychologist we first met in Sábanas para Recordar, is looking for somewhere to live. He rents a room in Flor’s family’s house, and finds himself drawn into the complicated erotic atmosphere of the household. The relationships between Tenniel and the sisters develop rapidly, while Mimi becomes another participant in the increasingly tangled situation.

In Harrison’s original conception the story apparently ended on a much darker note. The first 49 pages comprise the actual story; the additional pages were produced at the publishers’ request because they wanted a less unhappy ending.

This version of Flor Tabú was serialised in Kiss Comix X27 in January 1993. A French edition was subsequently almost completely redrawn and provided the basis for an English translation. The story has since been reissued in other languages, including a 2023 German edition from Riedl Verlag.