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Genus Neoregelia in Family Bromeliaceae

In botanical taxonomy, a genus (plural genera) is a rank used to group closely related species within a family. In the hierarchy, genus sits below family and above species.

Genera are defined by shared morphological, anatomical, and genetic characteristics (for example, features of flowers, fruits, seeds, or leaves) that indicate a close evolutionary relationship among the species they contain.

Each genus can include one or more species. Examples include Rosa (roses) and Solanum (nightshades, including tomato and eggplant).

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Genus Description

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Neoregelia L.B.Sm., a genus in the family Bromeliaceae, comprises approximately 115 species of tank‑forming epiphytes and lithophytes centered in the Atlantic Forest of eastern Brazil (POWO, 2024; WFO, 2024). A few species extend into Paraguay and northeastern Argentina. The type species is Neoregelia spectabilis L.B.Sm., historically designated as the nomenclatural reference for the genus (Smith et al., 1974). The plants typically grow in humid lowland to montane forest, often from sea level to 1 500 m, where they anchor to tree trunks or rock outcrops.

The rosette of narrow, often spiny‑margined leaves creates a central “tank” that collects rainwater and detritus, a defining bromeliad syndrome. Leaves are linear‑lanceolate, commonly with a thick, waxy cuticle and varied coloration from deep green to vivid reds and purples. Inflorescences are sessile, dense heads nestled within the leaf rosette, bearing three sepals, three petals, and numerous stamens typical of Bromeliaceae; the ovary is inferior with axile placentation. Fruit matures as a fleshy berry, and seeds are equipped with trichome‑covered wings that aid wind dispersal.

Species richness peaks in the states of Rio de Janeiro, São Paulo and Minas Gerais, with many narrow endemics such as Neoregelia bahiana and N. burle-marxii (Barfuss et al., 2016). Elevational turnover is pronounced; lower‑elevation taxa favor coastal forest while higher‑elevation forms inhabit shaded, moss‑laden cliffs. Biogeographically, the genus reflects the Pleistocene refugia model of the Atlantic Forest, showing pronounced phylogeographic structure (Gouda & Butcher, 2023).

Pollination is primarily by hummingbirds attracted to the nectar‑rich flowers; occasional insect visits have been recorded. Seed dispersal is anemochorous, facilitated by the winged seed coat. Chromosome numbers consistently report 2n = 50, indicating a base number x = 25 for the genus (Barfuss et al., 2016).

Taxonomically, Neoregelia has been split into two major clades in recent molecular phylogenies, and a recent monograph (Gouda & Butcher, 2023) synonymised several former Nidularium species under Neoregelia, whereas other authors retain Nidularium as distinct (Luther, 2008). This reconciles alternative circumscriptions, but the boundaries of subgenera and sections remain unstable.

Culturally, Neoregelia is a cornerstone of bromeliad horticulture; numerous hybrids and cultivars are prized for their foliage coloration, and the genus is widely cultivated in tropical gardens and indoor displays. The plants have no major timber or agricultural value and are not considered invasive.

Many species face habitat loss from deforestation and illegal collection; assessments are incomplete, with many listed as Data Deficient. Continued taxonomic clarification and ex situ conservation are essential to preserve the genus’s diversity.

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