SafePlants

Cyperus ochraceus: Pond Flatsedge

Cyperus ochraceus, commonly known as Pond Flatsedge or Yellow Sedge, belongs to the Cyperaceae (Sedge) family.

Taxonomy and Nomenclature

• Scientific Name: Cyperus ochraceus Vahl
• Common Names: Pond Flatsedge, Yellow Sedge
• Family: Cyperaceae (Sedge Family)
• USDA Symbol: CYOC2

Distribution and Habitat

• Pond Flatsedge is found on pond shores, river sandbars, and in ditches, often on sandy soil.
• It is present in the UK, with an estimated 400,000 ponds (excluding garden ponds).
• Specifically mentioned locations include Long Island, NY, South Florida, Brighton State Park, Island Pond, Vermont, and various ponds in National Parks.

Ecological Role

• Umbrella flatsedge can become invasive in some areas.
• In certain National Parks, it is noted as present, not native, and naturalized.

Morphological Characteristics and Growth Habits

• Pond flatsedge is described as a graminoid (grass-like) plant.
• Flower colors include green, yellow, and brown.
• It is a perennial flatsedge that can grow 1-3 feet tall and is unbranched.
• It is often seen at the edges of rivers and ponds.

Considerations for Pets

• The text mentions "Sharp Edge Sedge" in relation to Cyperus haspan, which is related to Cyperus ochraceus.

Considerations for Children

• The text mentions "Sharp Edge Sedge" in relation to Cyperus haspan, which is related to Cyperus ochraceus.

Quirky Facts

• The text references that during late Spring, pond flatsedge can be placed outdoors, "possibly sheltered by the wind".
• The text suggests to avoid exposing pond flatsedge to temperatures below 15C.