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Eleocharis obtusa

blunt spikerush add to wishlist

Plant types and subtypes: Grasses, Sedges, Wetland Grasses, Ornamental Grasses

Light Requirements: sun, part-sun

Water Use: high

Soil Moisture: moist, wet

Soil Description: acid, neutral, alkaline, average, clay, sand, gravel/rock

Height: 10"-18"

Bloom Time: June, July, August, September

Bloom Color: yellow

Leaf Color: green

Hardiness Zone: 3, 4, 5, 6, 7, 8, 9

Additional Tags: attracts birds, colonizing, emergent, naturalizing, ornamental foliage, pond margin plant, stream margin plant, swamp plant, water garden plant, wetland plant

Eleocharis obtusa (blunt spikerush)
  • Eleocharis obtusa (blunt spikerush)
  • Eleocharis obtusa (blunt spikerush)
  • Eleocharis obtusa (blunt spikerush)

Pricing & Availability

Description

Eleocharis obtusa

Also known as:

blunt spikerush

,

spike-rush

Scientific Synonyms:

Scirpus obtusus

Description

Eleocharis obtusa is an attractive sedge that forms rounded clumps up to 20" tall. Though it has leaves, these are so tightly wrapped around the base of the stems (known as culms), that they are inconspicuous. Each culm is terminated by a distinctive, oval, flat-topped seed head.

Cultivation

Eleocharis obtusa is typically found growing at the edge of freshwater marshes, ponds, rivers, and in wet prairies and meadows. Although it is occasionally found in moist open woodlands, it should be considered shade intolerant. It is well adapted to average soil, that can vary from fine textured and sandy, heavy poorly drained clay, to coarse gravelly and rocky. It is an emergent species and can withstand permanent inundation in shallow freshwater (it is not tolerant of salt). Plants can be grown in typical garden conditions, provided they are not allowed to dry out for extended periods of time. It is an annual and will not reproduce vegetatively. It self-seeds readily, without becoming aggressive, and will provide a perennial presence under optimal conditions. Flower and seed production occurs from early summer to early fall. Zones 3-9

Propagation

Propagate from seed only. These do not require pretreatment.

Additional Notes

The non-aggressive nature of blunt spikerush makes it a good choice for use around small water features, ponds and in water gardens. It will not withstand competition from taller, more aggressive, perennial wetland species.

Native Range & Classification

Recorded County Distribution: USDA data

Native Range:
AL, AR, CA, CO, CT, DC, DE, FL, GA, IA, ID, IL, IN, KS, KY, LA, MA, MD, ME, MI, MN, MO, MS, NC, NE, NH, NJ, NM, NV, NY, OH, OK, OR, PA, RI, SC, SD, TN, TX, VA, VT, WA, WI, WV

USDA Endangered Status:

  • Endangered: PA

Classification

Kingdom Plantae Plants
Subkingdom Tracheobionta Vascular plants
Superdivision Spermatophyta Seed plants
Division Magnoliophyta Flowering plants
Class Liliopsida Monocotyledons
Subclass Commelinidae
Order Cyperales
Family Cyperaceae Sedge family
Genus Eleocharis spikerush
Species Eleocharis obtusa blunt spikerush