Eleocharis microcarpa, commonly known as small-fruited spikesedge or spike-rush, is a perennial herb native to marshes, wet meadows, and the edges of ponds and streams in North America. This species is adapted to saturated soils and often forms dense colonies. It typically grows to a height of 10-35 cm and features slender, grass-like stems with small, inconspicuous flowers that are greenish-brown to straw-colored, blooming from late spring to early fall.

Small-fruited spikesedge is valued for its role in wetland ecosystems, providing habitat and food for wildlife, and is used in restoration projects to stabilize soil and filter water. It is well-suited for rain gardens and naturalized areas where it can tolerate fluctuating water levels. In cultivation, it requires consistently moist to wet soils and can grow in full sun to part shade conditions. While not commonly found in the horticultural trade, it can be a useful plant for ecological gardening. Potential problems include susceptibility to drought and competition from more aggressive wetland species.CC BY-SA 4.0