PlantaeDB Logo
Login Sign-up

Genus Dyckia 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).

Do you wish to read more about plant taxonomy? Click here!

Genus Description

Suggest a correction!

Dyckia (Schult.f.) is a bromeliad of Bromelioideae. About 140 species are currently accepted (Smith & Downs, 1974; Luther, 2008; WFO, 2024; POWO, 2024), native mainly to Brazil with centers of richness in the campos rupestres of Minas Gerais and the caatinga and cerrado of eastern and central Brazil; outliers occur in Paraguay, Argentina, Bolivia, and Uruguay. Dyckia bracteata is often treated as the type. The genus forms rosettes of stiff, often xeromorphic leaves with spiny margins and conspicuous leaf sheaths; indumentum is diverse but usually sparse on the lamina and concentrated on the sheath. The inflorescence is terminal, erect, simple or laxly paniculate, with scape bracts and usually small, numerous flowers. Flowers have free or weakly fused sepals and petals; the filaments are free or occasionally basally connate, and the style is relatively long with an expanded stigma. The ovary is superior with axile placentation, and the fruit is a septicidal capsule; seeds are winged or appendaged.

Species richness concentrates in Brazil’s campo rupestre and caatinga, with numerous narrow endemics on rocky outcrops and cliffs from near sea level to mid elevations. Habitats range from exposed rock faces and sandy soils to shaded ravines, often on quartzite or granitic substrates. Pollination is known to be ornithophilous in several taxa (e.g., D. goehringii), producing tubular, orange to red flowers with relatively dilute nectar and diurnal anthesis; others appear adapted to bees with broader, yellow flowers and stronger fragrances, indicating multiple pollination syndromes across the clade (Versieux et al., 2012). Dispersal is primarily wind-mediated via capsular seeds. Many species exhibit crassulacean acid metabolism (CAM), reinforcing their xeric tolerance, though quantitative physiological datasets remain limited. Base chromosome number is x=25 (Marchant, 1967; Bcryptari et al., 2011), with polyploidy documented.

Dyckia has been treated within Bromelioideae in major bromeliad classifications (Smith & Downs, 1974; Luther, 2008; WFO, 2024). Molecular phylogenies consistently place Dyckia within the bromelioid clade and suggest a sister-group relationship to Encholirium within the Puyoideae sensu Givnish et al. (2010), though taxon sampling and resolution vary among analyses. Historically sectioned as Dyckia sect. Orthopithon and sect. Prionopsis (and the subgenus Stellata as used by some authors), the sectional framework has been reconsidered in light of recent phylogenies that support a more consistent recognition of morphological vs. molecular lineages. Alternative generic boundaries persist for certain intermediate species that bridge Encholirium and Dyckia; Versieux et al. (2012) illustrate the ongoing challenges in aligning strict morphological definitions with molecular evidence.

The genus is prominent in horticulture for rosette architecture and colorful foliage, with taxa such as D. bracteata and D. fosteriana widely cultivated and occasionally naturalizing in warmer regions; most species remain specialist ornamentals rather than invasive. Conservation concerns are high, as numerous endemics are threatened by habitat loss through mining, agricultural expansion, and climate-driven droughts; ex situ conservation and targeted field surveys are priorities to resolve taxonomy and protect hotspots.

Pick a Species to see its components: