SafePlants

Cyperus rotundus

Cyperus rotundus, commonly known as coco-grass, Java grass, nut grass, purple nut sedge, purple nutsedge, or red nut sedge, is a species of sedge recognized as a persistent weed in lawns and gardens. It is often referred to as "nutgrass" due to its resemblance to grasses, although it is a true sedge.

Considerations for Pets

• This plant has tubers under the surface.
• The plant is known for its strong structure. The stems are triangular shaped and thick.

Considerations for Children

• This plant has tubers under the surface.
• The plant is known for its strong structure. The stems are triangular shaped and thick.

Taxonomy and Nomenclature

• Scientific Name: Cyperus rotundus
• Common Names: Coco-grass, Java grass, nut grass, purple nut sedge, purple nutsedge, red nut sedge. Other names include Dila Motha (India).
• Family: Cyperaceae
• Synonyms: C. hexastachyos, Pycreus rotundus (L.) Hayek
• Taxonomic Rank: Species
• Subspecies: rotundus (nominate), divaricatus Lye, merkeri (C.B.Clarke) Kk., and retzii Kk. The variety taylorii is also mentioned.

Distribution and Habitat

• Widely distributed and considered an invasive species.
• Found in gardens, lawns, and landscapes, particularly in moist, poorly drained areas.
• Native Status: HI I L48 I PB I PR I VI I.

Ecological Role

• Considered a horrifically resilient and invasive weed.
• Competes with garden crops and landscape plants, restricting their establishment and growth.

Morphological Characteristics

• Resembles grasses but is a true sedge with thicker and stiffer leaves.
• Stems are smooth, unjointed, and triangular in cross-section.
• Purple nut grass can grow up to 50 cm high.
• Yellow nutgrass can grow up to 90 cm in height and has a single stem.
• The leaves of the purple nutgrass sprout in ranks.

Quirky Facts

• Despite the name "nutgrass," it is not a true grass and doesn't bear nuts. The name refers to its nut-like tubers.