California arrowhead
Sagittaria montevidensis Cham. & Schltdl.

Sagittaria montevidensis is a species of flowering plant in the family Alismataceae. It is known by the common names giant arrowhead and California arrowhead. The species was first described in 1827 by Cham. & Schltdl.
Description
Sagittaria montevidensis is a member of the genus Sagittaria and is part of the water-plantain family Alismataceae. It is distributed across multiple regions, including the conterminous 48 United States, parts of South America, and other locations such as Brazil, Argentina, and Chile. The species has been documented in various states and territories, including California, Colorado, Connecticut, and others.
Other common names
Giant arrowheadCalifornia arrowheadhooded arrowhead
Distribution
BR · Nearctic · Neotropical · TW · TZ · AU · NZ · conterminous 48 United States · Alabama · Argentina Northeast · Argentina Northwest · Arkansas · Bolivia · Brazil Southeast · Brazil South · California · Chile Central · Chile South · Colorado · Connecticut · Delaware · Ecuador · Florida · Georgia · Illinois · Indiana · Iowa · Jawa · Kansas · Kentucky
Synonyms
Sagittaria pugioniformis var. montevidensisSagittaria montevidensis f. normalis