Scirpus is a genus of aquatic, grass-like species in the family
Cyperaceae (the sedges), many with the common names
club-rush or
bulrush (see also
bulrush for other plant genera so-named). Other common names are
deergrass or
grassweed. They have grass-like leaves, and clusters of small spikelets, often brown. Some species (e.g.
S. lacustris) can reach a height of 3 m, while others (e.g.
S. supinus) are much smaller, only reaching 20–30 cm tall.