Please answer the following question: Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. Mesostigma - Mesostigma viride is a species of freshwater green algae. It is now considered to be one of the earliest diverging members of the Streptophyta one of the two lineages of green plants (Viridiplantae).Earlier studies were unable to resolve the position of the species and it was often placed as a sister to all other green algae as one of the basal members of the Streptophyta or as close to Chaetosphaeridium.
A:
Plant