PlantaeDB Logo
Login Sign-up

Genus Dactyloctenium in Family Poaceae

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!

Dactyloctenium (Willd.) is a tropical grass genus in Poaceae (tribe Cynodonteae; Chloridoideae), comprising approximately ten species of annuals or short-lived perennials. It is distributed across Africa and Madagascar, with outlying taxa in the Arabian Peninsula and Australia. The type species is Dactyloctenium aegyptium (L.) P.Beauv., widely used as a reference point in treatments (POWO, 2024; WFO, 2024). The genus is diagnosable by its characteristically digitate or subdigitate inflorescences (two to several racemes borne in a whorl at the culm apex), spikelets that are laterally compressed and often more than two‑flowered, lemmas that are keeled and bear long, recurved awns forming comb‑like hooks, and membranous ligules (Clayton & Renvoize, 1986; Peterson et al., 2015).Plants form tufted to rhizomatous bunches, with flat or folded leaf blades and an indumentum that varies from glabrous to pubescent; caryopses are small, ovoid, with a linear hilum (Clayton & Renvoize, 1986; FTEA, 2010). Centers of diversity and endemism occur in tropical Africa and Madagascar, with additional species in seasonally arid regions of the Middle East, India, and northern Australia. Typical habitats include disturbed ground, savanna grasslands, woodland margins, and coastal sands, from sea level to mid‑elevations (Phillips, 1974; FTEA, 2010).The species are wind‑pollinated like most grasses, and the hooked lemma awns promote epizoochorous dispersal by attaching to animal fur and clothing (Peterson et al., 2015). Seed anatomy follows the panicoid–chloridoid pattern typical of the family, and base chromosome numbers are reported as x=9 or x=10; for example, D. aegyptium has been recorded as 2n=36 (Goldblatt & Johnson, 2000).Within the tribe, molecular work resolves Dactyloctenium as a member of the Chloridoideae, distinct from Eleusine despite historical confusion around the identity of E. coracana (the African grain “finger millet”); Eleusine s.str. is phylogenetically separate, with modern treatments retaining Eleusine for that crop (Peterson et al., 2015; GBIF, 2024). Segregate generic concepts such as Acritochaete have been subsumed under Dactyloctenium, and generic boundaries remain stable in current checklists (POWO, 2024; WFO, 2024).Dactyloctenium aegyptium is a widely naturalized ruderal and pasture species, occasionally used as a lawn or amenity grass in warm regions; other taxa are of local agronomic or pastoral value, and some can become weeds in agricultural settings. In the Red List frameworks, the genus is largely widespread and common, and conservation concerns concentrate on narrow endemics or habitat degradation; one forward‑looking statement is that improved distribution datasets and targeted field surveys would resolve remaining species‑level uncertainties.

Pick a Species to see its components: