Cyperus michelianus is a species of flowering plant in the family Cyperaceae, commonly referred to as a sedge. The species authority is (L.) Delile, indicating that it was originally described by Carl Linnaeus and later transferred to the genus Cyperus by Alire Delile.
Taxonomy
- Kingdom: Plantae
- Clade: Tracheophytes
- Clade: Angiosperms
- Clade: Monocots
- Order: Poales
- Family: Cyperaceae
- Genus: Cyperus
- Species: C. michelianus
Description
Cyperus michelianus is a herbaceous, perennial (occasionally annual) sedge that forms tufts or loose clumps. Mature plants typically reach heights of 20–80 cm. The culms are erect, trigonous (triangular in cross‑section), and smooth. Leaves are basal, narrow, and linear, often shorter than the culms. The inflorescence consists of a compound umbel bearing several spikelets; each spikelet is 5–10 mm long and contains multiple florets. The fruit is a small, brown, one‑seeded achene.
Distribution and Habitat
The species has a broad, largely cosmopolitan distribution, occurring across temperate and tropical regions of:
- Asia (including China, India, Japan, Southeast Asian countries)
- Africa (north‑central and sub‑Saharan regions)
- Europe (particularly the Mediterranean basin)
- Australia (northern parts)
Cyperus michelianus is typically found in wet or seasonally inundated habitats such as marshes, riverbanks, rice paddies, shallow lakes, and other moist, poorly drained soils. It tolerates a range of salinities and is often recorded in brackish environments.
Ecology
The plant is adapted to fluctuating water levels and can persist in both submerged and emergent conditions. Its seeds are dispersed primarily by water (hydrochory) and may also be transported by waterfowl. In agricultural settings, particularly in rice cultivation, C. michelianus can behave as a weed, competing with the crop for nutrients and light.
Uses
There are no widely documented economic uses of Cyperus michelianus. It is occasionally studied in ecological research concerning wetland plant communities and may be used in phytoremediation trials due to its tolerance of saline and water‑logged soils.
Conservation Status
The species is not listed as threatened on the IUCN Red List and is generally considered of Least Concern because of its extensive range and adaptability to disturbed wet habitats.
References
- Flora of China, Volume 23, “Cyperus michelianus”.
- Kew Gardens, Plants of the World Online (POWO) – taxonomic details for Cyperus michelianus.
- USDA NRCS Plant Database – distribution and habitat notes.
This entry reflects currently available encyclopedic information and does not include speculative content.