Scientific Name: Cyperus esculentus (Cyperaceae).
English Name: Chufa Sedge; Nut Grass; Yellow Nutsedge; Tiger Nut Sedge; Earth Almond; Chufa Flatsedge; Yellow Nutgrass.
French Name: Souchet comestible (='edible sedge'); Souchet sucré (='sweet sedge'); Souchet tubéreux (='tuberous sedge'); Amande de terre (='earth almond'); Souchet sultan (='sultan sedge').
5 Key Characters:
- up to 90 cm high.
- triangular stems.
- narrow leaves (3 - 10 mm wide).
- seeds flat and oval.
- seedheads distinctive, with 4 bracts (leaf like) at right angles to each other.
Lookalikes: When young the species can be mistaken for the grasses Cocksfoot Dactylis glomerata or Couch Elymus repens, but grasses do not have triangular stems.
Habitat: Moist sandy soil such as river sands eg along the Loire. Takes advantage of soil disturbance.
Status: Invasive alien.
Photographed by Loire Valley Nature: