Tillandsia calocephala Wittm.

Taxonomic Notes:

• According to L. B. Smith (Phytologia Vol. 21, March, 1971) T. calocephala is synonomous with T. nana. In general, we agree with L. B. Smith, but the southern Peruvian T. calocephala is quite different. It is much larger than the Tarma plant and the "involucrum" beneath the flower head is more distinct. —See Rauh 1974d p. 172-173
• Considered a synonym of Tillandsia nana Baker, but not followed by Rauh —See Smith & Downs 1979 p. 807

Literature references:

BSA (Web) Rauh 1981, 1990: Abb. 109 Smith & Downs 1977: 807