Toxic Plant Inconnu - Inadequate information on toxicity found.
Image of Cyperus strigosus
Source: Gilles Ayotte
Cyperus strigosus

Plant Names

image of Graminée
Cyperus strigosus
Straw-coloured Flatsedge
Souchet hispide

Synonyms

false flatsedge
false nutsedge
straw-coloured cyperus
straw-coloured umbrella sedge

Plant Characteristics

Couleur de floraison: Vert Bloom Period: Jul - Jul
Hauteur max: 3,0 feet
Max Width: 2,0 feet (spreads by rhizome)
Light Condition:
Full sun Plus de 6 heures d'ensoleillement par jour
Part shade More than 2 or 3 hours but less than 6 hours of direct sun a day
Soil conditions:
Moisture medium Tolerates medium soil condition
Lifespan: Vivace des plantes qui reviennent année après année
Gardener Experience:
plant spread by rhizome Spreads by rhizome
plant germinate easy Facile à germer
plant self seeding Self-seeding
Landscape Uses:
wetland garden Souhaitable dans les jardins de zone humide
rain garden Suitable for rain gardens
Ecological Benefits: No ecological benefits information available.
Tolerates:
Transplantation Tolerant Tolerates transplantation
Special Features and Considerations:
causes skin rashes This plant causes skin rashes

Seed and plant distribution status

No seeds available for this plant.
Nous acceptions les semences de cette plante

Faits intéressants

Straw-coloured Flatsedge has slender, upright stems and narrow green leaves. Its small flower clusters mature to a distinctive straw or golden-brown colour, giving the plant its common name. It flowers from summer into fall and naturally occurs in moist meadows, marsh edges, wet fields, shorelines, ditches, and other seasonally wet areas. It is a useful choice for wet meadows, pond edges, native borders and naturalized areas. Let it self-seed to get plants from year to year. It can be useful in areas where conventional lawn grasses perform poorly because of seasonal wetness.

Plant Location

Native to Ottawa region: Oui

Distribution according to VASCAN

Distribution: Cyperus strigosus
Ephemeral Native Introduced Excluded Extirpated Doubtful Absent

Thrives in Ecozones

  • Maritime de l'Atlantique
  • Bouclier boréal
  • Plaines à forêts mixtes

Ecological Benefits

Butterflies Supported by Cyperus strigosus

No butterfly data available for this plant.

Specialized Bees Supported by Cyperus strigosus

No bee data available for this plant.

Complementary Plants

  • No complementary plants found.

Substitute For Non-Native Plants

  • Pennisetum setaceum (Fountain Grass)

Sowing Information

Download Seed Envelope Labels (PDF)
  • Sowing depth: Surface sow
  • Sow by February
  • Stratification duration: 60 days
  • Self-seeding

Harvesting and Seed Sharing

  • Harvest start month: August
  • Harvesting indicator:
    • Seeds easily fall off when you gently pull them off
  • Harvesting:
    • Utiliser la main pour détacher de la tige principale
  • Seed viability test:
    • Pas de test requis avant le don
  • Packaging measure: A dozen (12) seeds (eyeball)
  • Seed storage:
    • Sécher à l'air dans un sac en papier ou contenant ouvert, pour quelques jours jusqu'à sec
    • Secouer de temps à autre pour prévenir la moisissure
  • Cultivar: Yes, do not donate unless you know source, and there are no known cultivars in your garden or at proximity
  • Harvesting notes: Please note that in 2025 and before, we partly distributed Perennial Yellow Flatsedge (Cyperus esculentus) instead of Straw-Coloured Flatsedge (Cyperus strigosus). Please check your plants before donating. Thanks!
  • No harvesting video available at this time.

Toxicity Notes

Inadequate information on toxicity found.