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Water bentgrass

Catabrosa aquatica · Aquatic plants

Water bentgrass: Out of the water

Out of the water · Photo: Наталья Пикалова / CC BY

NativeEmergent

Also called Water whorlgrass, Brookgrass

How to identify Water bentgrass

  • Soft grass with stems lying in the water and rooting
  • Open head of small, purplish spikelets
  • Smooth, boat tipped leaves
  • Mats in shallow running water

Similar plants

Mannagrasses are taller with closed sheaths; watercress has divided leaves.

Growth profile

Growing seasonGrows from spring through fall, flowers June to August.
Starts growingAbout 45 F water
LightFull sun to part shade
DepthSaturated soil to about 1 foot of water
How it spreadsRooting stems and seeds
HabitatSprings, spring fed ponds, ditches and slow streams with cold water.

Why it matters in a lake

Typical of cold springs.

Where it is found

  • Idaho: Occasional
  • Oregon: Occasional
  • Wyoming: Occasional

Classification

KingdomPlantae
PhylumTracheophyta
ClassMagnoliopsida
OrderPoales
FamilyPoaceae
Scientific nameCatabrosa aquatica

Need a hand?

Is it taking over your lake?

We identify what is growing, map how much of it there is and build a control plan that targets it without harming the rest of the lake.

Idaho / Wyoming (208) 501-4531Oregon (541) 280-0596