Perennial emergent bottom-rooted aquatic. Grows submerged in winter, floats on surface over summer. Deep green, sharply pointed, brittle leaves form rosette resembling a pineapple. Delicate white flowers (Jan) 3 petals; sheath at top of flower resembles crab’s claw.
Still freshwater: ponds, ditches, sheltered backwaters.
Seed spread by water. Spreads locally by runners.
Dense vegetation blocks waterways impedes drainage, disrupts recreation, chokes hydro turbines. Out-competes native species.
NOTIFIABLE ORGANISM. Report immediately to ARC Biosecurity staff ph 09 366 2000 or firstname.lastname@example.org Plant not known in NZ
Caution: when using any herbicide or pesticide PLEASE READ THE LABEL THOROUGHLY to ensure that all instructions and safety requirements are followed.