He thought he had found a close relative to Epiphyllum anguliger.

Stems flat, lobed as in Epiphyllum anguliger, with small spines.

Epiphyllum anguliger, commonly known as the fishbone cactus, is a cactus species native to Mexico.

Most closely allied to Epiphyllum crenatum and Epiphyllum anguliger.

This species is very distinct and its nearest relatives are Epiphyllum laui and Epiphyllum anguliger.

Two other epiphytic cacti from other genera show similar strongly notched flat stems and which, when not in flower, are not readily distinguishable from this species: these are Epiphyllum anguliger and Weberocereus imitans.

Epiphyllum anguliger, commonly known as the fishbone cactus, is a cactus species native to Mexico.