ctenium

Ctenium is a genus of grasses in the family Poaceae, commonly known as toothgrass. The genus comprises several species native to tropical and subtropical regions of the Americas. Ctenium grasses are perennial, tufted plants with slender stems and narrow leaves. The flowering head is a dense panicle bearing small spikelets, and in some species the arrangement of spikelets suggests a comb-like pattern, a feature reflected in the name’s etymology.

Distribution and habitat

Ctenium species are typically found in open, sunny habitats such as savannas, clearings, and disturbed sites. They prefer well-drained soils and can tolerate periodic drought. Some species are adapted to rocky substrates or coastal plains, where they contribute to local plant communities and soil stabilization.

Taxonomy and identification

The taxonomy of Ctenium places it within the grasses (Poaceae). The circumscription of the genus has varied among floras and over time, with different classifications recognizing different numbers of species. Diagnostic features commonly cited include tufted growth, slender culms, and the distinctive panicle bearing small spikelets. The genus name derives from Greek for comb, alluding to the notable spikelet arrangement seen in some species.

Cultivation and uses

In cultivation, Ctenium species are primarily of ornamental and native-plant interest rather than major commercial crops. They are used in native plant gardens and naturalistic landscapes for texture and drought tolerance. They require full sun and well-drained soil and are generally less suited to heavy shade or waterlogged conditions. Some species are valued for their role in habitat restoration and erosion control in appropriate climates.

See also

Ctenidium, a term in anatomy referring to comb-like gill structures in mollusks.