Western Pearlwort: Sagina decumbens ssp. occidentalis (Synonym: Sagina occidentalis) -
Bird-eye 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) -