Key to Subgenera of Neoregelia
1. Petals free; pedicels usually obscure (distinct in N. aculeatosepala) and merging with the slender ovaries. Amazon Basin. subgen 1. Hylaeaicum.
1. Petals connate; pedicels usually distinct (obscure in N. laevis) and making a sharp contrast with the base of the stout ovary. Eastern Brazil. subgen 2. Neoregelia. —SeeSmith & Downs 1979