American water-willow

Justicia americana

The American water-willow is a lovely plant that grows near water. It has long, green leaves and pretty flowers that attract butterflies and bees.

Habitat: Wetlands

Appearance

The American water-willow has upright, bamboo-like stems and narrow, lance-shaped leaves resembling those of a willow. Its delicate white to pale lavender flowers feature two lips and distinctive purple markings on the lower petal, making it stand out among other wetland plants.

KingdomPlantaePhylumTracheophytaClassMagnoliopsidaOrderLamialesFamilyAcanthaceaeGenusDianthera

American water-willow

Interesting facts

Despite its name, it's not a true willow tree, but a flowering herb!

In some places, it’s used in rain gardens because it loves wet feet!

Its Latin name 'Justicia' honors a Scottish gardener, James Justice!

Some fish species, like minnows, hide their eggs among its underwater stems!

Special abilities

American water-willow can send out creeping rhizomes that help it spread quickly and form dense mats, holding soil in place.

Its dense root systems help filter sediments from water, improving water clarity and stabilizing stream banks against erosion.

This plant can thrive in submerged conditions, thanks to adaptations that allow its roots to tolerate low oxygen during floods.

Measurements & details

Height: 15-75 cm
Spread: 30-150 cm
Flower Size: 1-2 cm
Bloom Season: Late Spring to Late Summer
Edible: Yes
Toxicity: None
Lifecycle: Perennial
Pollination Method: Insect

Ecological connections

pollinates

European honey bee

Apis mellifera

collects nectar from its flowers

pollinates

Common Eastern Bumblebee

Bombus impatiens

gathers pollen and nectar

shelters

Ironcolor shiner

Notropis chalybaeus

fish hide among its dense underwater stems

Traits

Deciduous

Deciduous plants periodically shed all their leaves, typically during autumn or dry seasons.

Ornamental

Ornamental plants are cultivated primarily for their aesthetic appeal, enhancing landscapes and gardens with their attractive foliage, flowers, or form.

Shrub

A shrub is a woody plant smaller than a tree, typically with multiple stems branching from or near the ground.

Summer Blooming

Summer blooming plants produce their flowers during the summer season, often providing vibrant color when many other plants have finished.

Fragrant Flower

Fragrant flowers emit a pleasant aroma, often to attract pollinators or for defense.

Colorful

Colorful describes organisms or objects displaying a wide range of bright and distinct colors.

Pollinator Magnet

Describes plants that are particularly attractive and beneficial to a wide range of pollinating organisms.

Wetland

This habitat trait identifies species found in wetlands, which are areas of land saturated with water, either permanently or seasonally, including marshes, swamps, and bogs.