Compressed Spike-Rush vs One-Glumed Spike-Rush

Eleocharis compressa compared with Eleocharis uniglumis

Taxonomic Classification

Rank	Compressed Spike-Rush	One-Glumed Spike-Rush
Kingdom same	Plantae (植物)	Plantae (植物)
Phylum same	Magnoliophyta (木兰植物门)	Magnoliophyta (木兰植物门)
Class same	Liliopsida (百合纲)	Liliopsida (百合纲)
Order same	Poales (禾本目)	Poales (禾本目)
Family same	Cyperaceae	Cyperaceae
Genus same	Eleocharis	Eleocharis
Species	Eleocharis compressa	Eleocharis uniglumis

Evolutionary Relationship

Compressed Spike-Rush and One-Glumed Spike-Rush share a common ancestor at the Genus level: Eleocharis.

Conservation Status

Compressed Spike-Rush

LC — Least Concern

One-Glumed Spike-Rush

LC — Least Concern

Physical Characteristics

Attribute	Compressed Spike-Rush	One-Glumed Spike-Rush
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Compressed Spike-Rush

Habitat

Typically found in grasslands, wetlands, forests, and cultivated landscapes.

Range

Found in United States.

One-Glumed Spike-Rush

Habitat

Typically found in grasslands, wetlands, forests, and cultivated landscapes.

Range

Found across Europe (7 countries) and North America (Canada).

Compressed Spike-Rush

<em>Eleocharis compressa</em>, commonly known as the Compressed Spike-Rush, is a perennial sedge-like plant in the family Cyperaceae, endemic to the eastern and central United States. It typically inhabits calcareous wetlands, prairie fens, wet meadows, and the margins of streams and lakes, favoring sites with shallow water or saturated soils that are often rich in calcium and magnesium. The species is characterised by strongly flattened, wiry stems and small, solitary spikelets at the stem tip, features typical of the genus Eleocharis. Like other spike-rushes, <em>Eleocharis compressa</em> is a photosynthetic primary producer with no true leaves, relying entirely on its green stems for carbon fixation. It provides important microhabitat for aquatic invertebrates and nesting cover for ground-foraging birds in fen communities. Currently assessed as Least Concern by the IUCN, the species faces pressure from wetland drainage, agricultural runoff, and the alteration of hydrology in prairie landscapes. However, it persists across a sufficient portion of its range to maintain a stable conservation status. Biological traits such as average lifespan, reproductive output, and growth dimensions remain poorly documented relative to more commercially studied wetland species, though it is typically a slow-growing, long-lived perennial.