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Callitriche lusitanica L., is a species of flowering plant in the family Callitrichaceae.

Description
Callitriche lusitanica L.. are aquatic plants that usually have lanceolate leaves. Lanceolate are linear shaped leaves that have long internodes. Internodes are located between two nodes from where the leaves emerge on the plant stem. Some aquatic plants have shoots that are exposed to the air, the internodes are shorter and have rosette leaves. Rosette leaves are elliptic and have a rounded end.

A genus is a category used taxonomic category that is ranked higher than a species. Chromosomes is a complex of protein and nucleic acids that is found in the nucleus of eukaryotic cells; it carries genes that carry genetic information for the cell to utilize.

Distribution
Found in Iberian peninsula. Pollen is without exine. Distributed in water.

Phytoremediation usage

 * Callitriche lusitanica L. has good potential for use of a phytoremediative for heavy metals. Especially so in areas of high heavy metal runoff such as by mines and areas of production where water is used and dumped frequently.
 * Arsenic
 * Within Callitriche, Callitriche lusitanica L., has the highest concentration of As (​​2346 mg/kg DW) according to a study by Favas, et al.
 * Uranium
 * Amongst the submerged class, Callitriche lusitanica L. has one of the highest concentration of U at 218 mg/kg DW according to a study by Favas, et al.