Pygmy rush  (Juncus pygmaeus)

Annual: lives or grows for just one year.
Colony: a group of organisms living together, individuals in the group are not physiologically connected and may not be related, such as a colony of birds. Another meaning refers to organisms, such as bryozoans, which are composed of numerous genetically identical modules (also referred to as zooids or 'individuals'), which are produced by budding and remain physiologically connected.
Perennial: plants that live for at least three seasons; after an initial period they produce flowers once a year.