Skip to main content


Chlamydomonas (division Chlorophyta) A genus of unicellular green algae in which each cell contains a single nucleus and a chloroplast the shape of which varies with species. The cell may be motile or nonmotile according to conditions of growth: motile cells have a pair of similar flagella at one end. There are many species. They are widely distributed and common, found in almost all types of aquatic environment and on moist soil. C. nivalis can grow on snow in mountains in N. America, the masses of cells giving rise to a reddish coloration known as ‘red snow’. (Chlamydomonas is sometimes classified as a genus of protozoa in the class Phytomastigophora.)

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"Chlamydomonas." A Dictionary of Plant Sciences. . 23 Mar. 2019 <>.

"Chlamydomonas." A Dictionary of Plant Sciences. . (March 23, 2019).

"Chlamydomonas." A Dictionary of Plant Sciences. . Retrieved March 23, 2019 from

Learn more about citation styles

Citation styles gives you the ability to cite reference entries and articles according to common styles from the Modern Language Association (MLA), The Chicago Manual of Style, and the American Psychological Association (APA).

Within the “Cite this article” tool, pick a style to see how all available information looks when formatted according to that style. Then, copy and paste the text into your bibliography or works cited list.

Because each style has its own formatting nuances that evolve over time and not all information is available for every reference entry or article, cannot guarantee each citation it generates. Therefore, it’s best to use citations as a starting point before checking the style against your school or publication’s requirements and the most-recent information available at these sites:

Modern Language Association

The Chicago Manual of Style

American Psychological Association

  • Most online reference entries and articles do not have page numbers. Therefore, that information is unavailable for most content. However, the date of retrieval is often important. Refer to each style’s convention regarding the best way to format page numbers and retrieval dates.
  • In addition to the MLA, Chicago, and APA styles, your school, university, publication, or institution may have its own requirements for citations. Therefore, be sure to refer to those guidelines when editing your bibliography or works cited list.