Native Plants

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Zannichellia palustris

Zannichellia palustris L.

Horned Pondweed, Horned Poolmat, Horned-pondweed

Zannichelliaceae (Horned pondweed Family)

Synonym(s): Zannichellia major, Zannichellia palustris var. major, Zannichellia palustris var. stenophylla

USDA Symbol: ZAPA

USDA Native Status: L48 (N), AK (N), CAN (N)

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Plant Characteristics

Duration: Perennial
Habit: Herb
Fruit Type: Drupe
Size Notes: Submersed stems up to about 20 inches long.

Bloom Information

Bloom Color: Green , Brown
Bloom Time: Mar , Apr , May , Jun , Jul , Aug
Bloom Notes: Inconspicuous flowers, lacking sepals and petals, are found at the bases of the leaves.

Distribution

USA: AK , AL , AR , AZ , CA , CO , CT , DC , DE , FL , IA , ID , IL , IN , KS , KY , LA , MA , MD , ME , MI , MN , MO , MS , MT , NC , ND , NE , NH , NJ , NM , NV , NY , OH , OK , OR , PA , RI , SD , TN , TX , UT , VA , VT , WA , WI , WV , WY
Canada: AB , BC , MB , NB , NL , NS , NT , ON , PE , QC , SK

Growing Conditions

Aquatic: yes

National Wetland Indicator Status

Region:	AGCP	AK	AW	CB	EMP	GP	HI	MW	NCNE	WMVE
Status:	OBL	OBL	OBL		OBL	OBL		OBL	OBL	OBL

This information is derived from: U.S. Army Corps of Engineers. (2023). 2022 National Wetland Plant List, version 3.6. U.S. Army Engineer Research and Development Center, Vicksburg, MS. https://wetland-plants.usace.army.mil/. Click here for map of regions.

Web Reference

Webref 30 - Calflora (2018) Calflora
Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Additional resources

USDA: Find Zannichellia palustris in USDA Plants
FNA: Find Zannichellia palustris in the Flora of North America (if available)
Google: Search Google for Zannichellia palustris

Metadata

Record Modified: 0000-00-00
Research By: TWC Staff

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