PlantaeDB Logo
Login Sign-up

Genus Leucheria in Tribe Nassauvieae

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!

Leucheria (Asteraceae: tribe Nassauvieae, subtribe Leucherinae) is a primarily herbaceous genus of roughly 130 species distributed through the Andes from Colombia to Patagonia, with additional taxa in Chile, Argentina, Bolivia, Peru, Ecuador, and the highlands of Brazil (Nesom, 2018; The Plant List, 2013). Its type species is Leucheria suaveolens Lag., as originally designated.

Morphologically Leucheria is distinguished by erect, often unbranched or sparsely branched perennial herbs and subshrubs bearing alternate, entire to lobed leaves that may be glabrous to woolly or glandular. Indumentum typically includes both glandular and non-glandular trichomes; stipules are absent. Inflorescences are paniculate or thyrsoid, bearing solitary or clustered heads, each with a multiseriate involucre of phyllaries that are basally fused in some species. Heads are heterogamous with ligulate corollas in both ray and disk florets; the style branches have paired papillose zones, a diagnostic trait for Nassauvieae. The ovary is inferior with basal axile placentation, producing fusiform, 5–10-ribbed cypselae bearing a pappus of numerous, minutely barbellate bristles that promote wind dispersal. Asteraceae-Specific morphological characters such as milky latex are absent, and the cypsela surface is frequently striate or reticulate (Nesom, 2018;Ortiz et al., 2009).

Diversity peaks in Andean cordilleras, with marked endemism across high-elevation grass-steppe and rocky slopes; in Chile, the genus exhibits exceptional local speciation, a pattern reflected in the country-level monograph (Ricci, 2006; ISR, 2024). Typical habitats range from 2000–4000 m, with some taxa in lowland grassland and scrub; southwestern species occupy coastal and interior cool temperate zones, illustrating a broad biogeographic spread.

Intrinsic biology remains incompletely documented. Records of pollination are sparse but generally implicate generalist insects; fruit dispersal is wind-assisted via the pappus. Chromosome base number is x=9, and counts vary among species (Nesom, 2018; CO Papa, 2008–2021).

Taxonomy and phylogeny have stabilized around a subtribe-level framework distinct from Proustia, historically merged but now separated based on morphological and molecular evidence (Nesom, 2012; Ortiz et al., 2009; Jara-S., 2023). Subgeneric sectional arrangements persist but are poorly resolved; a formal infrageneric classification is still tentative (Nesom, 2018).

Human relevance centers on horticulture and ornamental cultivation of showy-headed taxa, though broad cultivar use is limited; the genus is not a major crop or timber source and poses no notable weed problems.

Conservation concerns include habitat loss from mining, grazing pressure, and climate change at high elevations; targeted red-list assessments and ecological field studies remain gaps for many narrowly endemic species (IUCN SSC, 2024).

Pick a Species to see its components: