Guzmania monostachia var. alba Ariza-Julia

Literature references:

Baensch & Baensch 1994: 166 FCBS (Web) J. Bromeliad Soc.: 9:38b Oliva-Esteve & Steyermark 1987: 196 Smith & Downs 1977: 1339 U.S. Nat. Herb.