Virginia Tech Weed Identification Guide

Aquatic Weeds:

Common Name Scientific Name
Alligatorweed Alternanthera philoxeroides
American Elder Sambucus canadensis
American Speedwell Veronica americana
American Water Plantain Alisma subcordatum
American Water Willow Justicia americana
Arrowhead, Long-beaked Sagittaria australis
Arrow-leaved Tearthumb Polygonum sagittatum
Asian Dayflower Murdannia keisak
Asian Spiderwort Murdannia keisak
Bladderworts Utricularia spp.
Brazilian Elodea Egeria densa
Brittleleaf Naiad Najas minor
Cattails Typha spp.
Chara Chara spp.
Common Reed Phragmites australis
Coontail Ceratophyllum demersum
Creeping Primrose Ludwigia palustris
Creeping Rush Juncus repens
Curlyleaf Pondweed Potamogeton crispus
Dayflower, Asian Murdannia keisak
Dayflower, Marsh Murdannia keisak
Duckweeds Lemna spp.
Egeria Egeria densa
Elderberry Sambucus canadensis
Eurasian Watermilfoil Myriophyllum spicatum
Hornwort Ceratophyllum demersum
Lizard's Tail Saururus cernuus
Musk-grass Chara spp.
Naiad, Brittleleaf Najas minor
Pennywort, Marsh Hydrocotyle umbellata
Pickerelweed Pontederia cordata
Pondweed, Curlyleaf Potamogeton crispus
Pondweed, Slender Potamogeton pusillus
Pondweed, Variable-leaf Potamogeton diversifolius
Slender Naiad Najas minor
Slender Pondweed Potamogeton pusillus
Spiderwort, Asian Murdannia keisak
Stonewort Chara spp.
Tearthumb, Arrow-leaved Polygonum sagittatum
Tearthumb Polygonum arifolium
Variable-leaf Pondweed Potamogeton diversifolius
Water Hyacinth Eichhornia crassipes
Waterthread Pondweed Potamogeton diversifolius
Waterlilies Nymphaea spp.
Watermeal Wolffia spp.
Watershield Brasenia schreberi
Waterpurslane Ludwigia palustris
Water-starwort Callitriche heterophylla
Water Willow Justicia americana