Common Pearlwort: Sagina apetala (Synonyms: Sagina apetala var. barbata) -
Western Pearlwort: Sagina decumbens ssp. occidentalis (Synonym: Sagina occidentalis) -
Bird-eye Pearlwort, Procumbent Pearlwort: Sagina procumbens (Synonym: Sagina procumbens var. compacta) -
Alpine Pearlwort, Arctic Pearlwort: Sagina saginoides (Synonyms: Sagina linnaei, Sagina micrantha, Sagina saginoides var. hesperia, Spergula saginoides) -