SafePlants

Carex Species: A Diverse Genus of Sedges

The genus Carex, commonly known as sedges, encompasses a wide variety of species, each with unique characteristics and ecological roles. Sedges are often found in moist environments and are valued for their diverse foliage and adaptability in landscaping.

Considerations for Pets

• Some sedge species have leaves with rough textures that may cause minor irritation if ingested or rubbed against.

Taxonomy and Nomenclature

• Family: Cyperaceae (Sedge Family)
• Several Carex species are referenced, including:
  • Carex venusta (Darkgreen Sedge)
    • Synonyms: Carex oblita, Carex venusta var. minor
  • Carex bicknellii (Copper Shouldered Oval Sedge)
  • Carex binervis (Green-ribbed Sedge)
  • Carex brunnea (Narrow Sedge)
  • Carex dipsacea ('Dark Horse' Green sedge, Tahoata Autumn sedge, Teasel sedge, New Zealand sedge)
  • Carex aquatilis (Aquatic Sedge)
  • Carex cristatella (Crested Sedge)
  • Carex pendula (Weeping Sedge or Pendulous Sedge)
  • Carex phyllocephala 'Spark Plug'
  • Carex nigra (Black Sedge)
• Other sedges mentioned include:
  • Alpine Cottongrass (Trichophorum alpinum)
  • Green kyllinga (C. brevifolius)

Common Names and Etymology

• The specific epithet venusta means "beautiful or graceful".
• Carex venusta is commonly known as Darkgreen Sedge and Graceful Sedge.
• Other sedges and common names referenced include: Green-ribbed sedge, Narrow Sedge, Davall's Sedge, Bulrush, Dark Green Bulrush, Weeping Sedge, Pendulous Sedge, and Evergold Sedge.

Distribution and Habitat

• Carex binervis is a European species of sedge.
• Little green sedge inhabits river and lake shores, as well as Atlantic shores.
• Carex venusta has been found in Charles County, Maryland.

Morphological Characteristics and Growth Habits

• Sedges often form clumps and can be either evergreen or semi-evergreen.
• Foliage colors range from dark green, blue-green, yellowish-green, to olive-green, and can also feature variegation such as white or cream edges.
• Leaf textures can be rough.
• Some species have arching or weeping stems.
• Heights range from under a foot to several feet, depending on the species.
• Flowers can be inconspicuous or showy, with colors ranging from brown-black to tiny pink.
• Fruits can be dark purple.
• Stems are described as triangular in some species, such as the Dark-Green Bulrush.

Ecological Role

• Bulrush forms a buffer against wind and wave action.
• Sedges can provide persistent residual waterfowl nesting cover.

Interactions with Other Organisms

• The text refers to "Green Sedge insect" and Rhyacophila species, suggesting that sedges are a food source or habitat for certain insects.

Quirky Facts

• The text humorously notes that "Peduncled Sedge is not a genuine common name."

Further Information

• Discover Life offers a page about the biology, natural history, ecology, identification, and distribution of Carex venusta.
• The RHS (Royal Horticultural Society) provides information on Carex pendula.