''Sagittaria demersa'', commonly called Chihuahuan arrowhead, is an annual

aquatic plant Aquatic plants, also referred to as hydrophytes, are vascular plants and Non-vascular plant, non-vascular plants that have adapted to live in aquatic ecosystem, aquatic environments (marine ecosystem, saltwater or freshwater ecosystem, freshwater ...

growing up to tall. The

leaves A leaf (: leaves) is a principal appendage of the stem of a vascular plant, usually borne laterally above ground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", while the leaves, stem, ...

are flat, very long and narrow, up to long but rarely more than across.Haynes, R. R. & L.B. Holm-Nielsen. (1994). The Alismataceae. Flora Neotropica 64: 1–112. The species is native to north-central

Mexico Mexico, officially the United Mexican States, is a country in North America. It is the northernmost country in Latin America, and borders the United States to the north, and Guatemala and Belize to the southeast; while having maritime boundar ...

( Chihuahua,

Durango Durango, officially the Free and Sovereign State of Durango, is one of the 31 states which make up the Political divisions of Mexico, 32 Federal Entities of Mexico, situated in the northwest portion of the country. With a population of 1,832,650 ...

Hidalgo Hidalgo may refer to: People * Hidalgo (nobility), members of the Spanish nobility * Hidalgo (surname) Places Mexico :''Most, if not all, named for Miguel Hidalgo y Costilla (1753–1811)'' * Hidalgo (state), in central Mexico * Hidalgo, Coah ...

Aguascalientes Aguascalientes, officially the Free and Sovereign State of Aguascalientes, is one of the 32 states which comprise the Political divisions of Mexico, Federal Entities of Mexico. At 22°N and with an average altitude of above sea level it is pre ...

Jalisco Jalisco, officially the Free and Sovereign State of Jalisco, is one of the 31 states which, along with Mexico City, comprise the 32 Political divisions of Mexico, Federal Entities of Mexico. It is located in western Mexico and is bordered by s ...

and

Querétaro Querétaro, officially the Free and Sovereign State of Querétaro, is one of the Political divisions of Mexico, 32 federal entities of Mexico. It is divided into Municipalities of Querétaro, 18 municipalities. Its capital city is Querétaro Cit ...

) and also from a few sites in the northern part of the US State of

New Mexico New Mexico is a state in the Southwestern United States, Southwestern region of the United States. It is one of the Mountain States of the southern Rocky Mountains, sharing the Four Corners region with Utah, Colorado, and Arizona. It also ...

(

Mora Mora may refer to: People * José Maria Mora (1847–1926), Cuban-American photographer, often credited as "Mora" * Mora (singer) (born 1996), a Puerto Rican singer * Mora (surname), a Spanish name (includes a list of people with the name) Plac ...

and Colfax Counties).Biota of North American Program, ''Sagittaria demersa''
/ref> The plant occurs mostly submerged in streams and lakes.

References

{{Taxonbar, from=Q15572106 demersa Flora of Chihuahua (state) Flora of Durango Flora of Hidalgo (state) Flora of Mexico Flora of Aguascalientes Flora of Jalisco Flora of Querétaro Flora of New Mexico Freshwater plants Plants described in 1894