Persicaria sagittata, common names American tearthumb, arrowleaf tearthumb, or arrowvine, is a plant species widespread in the eastern half of North America as well as in eastern Asia. It has been found in every state and province from Texas to Manitoba to Newfoundland to Florida, plus Colorado and Oregon. It also grows in China, the Russian Far East, Siberia, Korea, Japan, northern India and Mongolia. It grows in moist areas along lake shores, stream banks, etc.
Persicaria sagittata is an annual herb up to 200 cm (80 inches) tall, with prickles along the stem. Leaves are up to 10 cm (4 inches) long, heart-shaped or arrowhead-shaped (unusual for the genus). Flowers are white to pink, borne in spherical to elongated clusters up to 15 mm (0.6 inches) long.
- "The Plant List, Persicaria sagittata". Royal Botanic Gardens, Kew and Missouri Botanic Garden.
- Biota of North America Program 2014 state-level distribution map
- Flora of North America, Persicaria sagittata (Linnaeus) H. Gross, 1919. Arrow-leaf tearthumb, arrow-vine, renouée sagittée
- Flora of China, Polygonum sagittatum Linnaeus, 1753. 箭头蓼 jian tou liao
- Merritt Lyndon Fernald. 1950. Gray's Manual of Botany, Eighth (Centennial) Edition. American Book Company, New York.
- Godfrey, R. K. & J. W. Wooten. 1981. Aquatic and Wetland Plants of Southeastern United States Dicotyledons 1–944. University of Georgia Press, Athens.