Aquatic WeedAquatic Weed

IdentificationIdentification

From C. A. Lembi1997

Algae

Planktonic Algae

Algae Bloom

Filamentous Algae -- Floating Mats

Chara sp.

NitellaNitella spp.

Each of the four types of aquatic plants favors a certain water depth. Typically, however, the growth areas are not sharply divided. Expect to see overlap in growth--submerged plants, for example, interspersed among floating-leaf varieties.

Types of Aquatic Plants

Pacific mosquitofernAzolla filiculoides

Common duckweedLemna minor

Water hyacinthEichhornia crassipes

F M M J J A S O N DJ A

After Kautsky, 1987

Seasonal Development of Sago Pondweed

CoontailCeratophyllum demersum

ParrotfeatherMyriophyllum aquaticum

Western watermilfoilMyriophyllum hippuroides

An uncommon native speciesnot considered weedy

Eurasian watermilfoilMyriophyllum spicatum

Northern watermilfoilMyriophyllum sibiricum

Eurasian watermilfoil

HydrillaHydrilla verticillata

Brazilian egeriaEgeria densa

Common elodeaElodea canadensis

Curlyleaf pondweedPotamogeton crispus

Sago pondweedStuckenia pectinatus

Leafy pondweedPotamogeton foliosus

Floatleaf pondweedPotamogeton natans

AmericanPondweed

Potamogetonnodosus

Creeping waterprimroseLudwigia peploides

Purple loosestrifeLythrum salicaria

Purple loosestrife vegetation

Giant horsetailEquisetum telmateia ssp. braunii

ScouringrushEquisetum hyemale ssp. affine

Giant reedArundo donax

Common cattailTypha latifolia

Hardstem bulrushScirpus acutus var. occidentalis

Pale smartweedPolygonum lapathifolium

Perennial pepperweedLepidium latifolium

Curlydock

Rumexcrispus

Himalaya blackberryRubus armeniacus