Frailea phaeodisca

Frailea phaeodisca (Speg.) Backeb. & F.M.Knuth (1936)

🌵 Author(s)	Curt Backeberg Frederik Marcus Knuth
🌵 Basionym	Echinocactus pygmaeus var. phaeodiscus (1905)
🌵 Basionym author(s)	Carlo Luigi Spegazzini
🌵 Basionym published in	Anales Mus. Nac. Buenos Aires (ser. 3), 4: 498 (1905)

Etymology

Greek phaios ‘dark, blackish gray’ + Greek diskos ‘quoit, disc’. For the color of the “disc”, i.e. the flattened plant body (see Spegazzini’s description of Echinocactus pygmaeus in Anales Mus. Nac. Buenos Aires (ser. 3), 4: 497-498. 1905), which distinguishes the taxon from Echinocactus pygmaeus var. pygmaeus (= Frailea pygmaea).