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Invasive Species: Water Soldier

Water Soldier

(Stratiotes aloides)
*Not detected in Michigan*


Report this species to:

EGLE Aquatic Invasive Species Program

If possible, please take one or more photos of the invasive species you are reporting. Also make note of the location, date and time of the observation. This will aid in verification of your report. You may be asked to provide your name and contact information if follow-up is needed.

- Or - use the Midwest Invasive Species Information Network (MISIN) online reporting tool

- Or - download the MISIN smartphone app and report from your phone -



  • Submerged aquatic plant, becomes buoyant during summer.
  • Leaves are 40 cm long, sword-shaped, sharply serrated edges, bright green.
  • Leaves form a large rosette.
  • Roots may or may not be attached to mud.
  • Looks similar to an aloe plant, spider plant, or top of a pineapple.
  • May produce a showy white flower with 3 petals.

water soldier
Photo courtesy of Saxifraga - Jan van der Straaten.

water soldier
Photo courtesy of Saxifraga – Hans Decker.

water soldier
Photo courtesy of Saxifraga – Branko Bakan.

Habitat: This aquatic perennial plant inhabits freshwater bodies like ponds, lakes, and rivers.

Native Range: Europe and northwest Asia.

Local Concern: Dense mats of vegetation can form to crowd out native species and decrease biodiversity. Water soldier can potentially alter water chemistry and could harm other aquatic organisms. Mats also hinder recreational activities and the sharp edges of this plant can cut swimmers.

Other Common Names: Water pineapple, water aloe.


Water Soldier Invasive Species Alert - Printable PDF

MDARD Weed Risk Assessment for Water Soldier (Stratiotes aloides) - This document evaluates the invasive potential of the plant species using information based on establishment, spread and potential to cause harm.