PlantaeDB Logo
Login Sign-up

Genus Suaeda in Family Amaranthaceae

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!

Suaeda is a halophytic genus in the subfamily Salicornioideae within Amaranthaceae, with about 110 accepted species (POWO, 2024; WFO, 2024). It occurs worldwide on saltmarshes, coastal mudflats, sabkhas, salt deserts, and inland saline steppes. Suaeda maritima is widely treated as the type species. The genus comprises annual herbs to low shrubs and small cushions. Plants are typically glabrous and highly succulent; leaves are alternate, often subterete or semi-terete, sometimes flattened, with a lower scarious or membranous sheath; the inflorescence is paniculate to glomerulate, sometimes spicate, with reduced bracts and often foliaceous bracteoles. Flowers are perfect or unisexual, 5-merous, with inconspicuous perianth segments that lack wings at maturity, subtended by a persistent involucral bract; the ovary is superior with a single basal ovule, and the fruit is an achene or thin-walled utricle with a membranous to crustaceous pericarp that remains in the persistent perianth.

Suaeda shows centers of diversity in the Mediterranean–Irano–Turanian region, Central Asia, and warm temperate to subtropical coastal zones, with numerous local endemics. Habitats range from sea-level saltmarshes to inland halite pans and alkaline steppes up to mid-altitudes, sometimes forming dense swards or cushion communities. Flowering typically follows spring–summer growth flushes, and fruits mature late in the season; seed retention in the perianth aids short-distance dispersal, with occasional long-distance transport in coastal drift. Life history is opportunistic in highly saline and fluctuating environments, and many taxa possess CAM-like photosynthetic patterns (Akhani et al., 2005). The base chromosome number is x = 9, with frequent polyploidy (Akhani et al., 2005; Schütze et al., 2003).

Suaeda is usually divided into two major subgenera: Suaeda and Schanginia, supported by phylogeny and morphology (Kadereit et al., 2012; Schütze et al., 2003). Recent regional syntheses have recircumscribed taxa and stabilized boundaries, for example reassessment of Mediterranean species (Volponi et al., 2020), but numerous segregates formerly maintained (e.g., Boleum, Holosteum, and Sesuvium of Suaeda sensu lato) are now excluded and transferred elsewhere (Kadereit et al., 2012). Treatment of invasive potential remains inconsistent across regions, reflecting taxonomic instability rather than unambiguous biogeographic change.

Suaeda species are utilized for forage and soil reclamation, and S. salsa is locally cultivated as a leaf vegetable; several taxa are valued in ornamental and restoration plantings for saltland revegetation. Conservation concerns focus on coastal development, habitat fragmentation, and reduced flood–drift dynamics; additional work is needed to quantify threat levels for the many narrow endemics and to refine species-level risk assessments.

Pick a Species to see its components: