The Genus Eremogone (Arenaria)
Mountain Sandwort: Arenaria capillaris ssp. americana
Fescue Sandwort, Mountain Sandwort, Slender Mt. Sandwort, Threadleaf Sandwort: Eremogone capillaris var. americana (Synonyms: Arenaria capillaris ssp. americana, Arenaria capillaris var. americana, Arenaria formosa) - Basal leaves matted. One to several stems are erect. Stem leaves up to 2 cm long, soft, widely spaced. Sepals obtuse or ovate in shape. Inflorescence an open cyme. The petals are at least several mm longer than the sepals.
Franklin's Sandwort: Eremogone franklinii var. franklinii (Synonym: Arenaria franklinii var. franklinii) - Matted perennials. Sepals narrowly lanceolate, tapering gradually from the base. Petals 2-3 mm shorter than to almost equal to the sepals. Stems very leafy, the leaves overlapping, linear-awl-shaped, the stems easily shattering.
Thymeleaf Sandwort, Thyme-leaf Sandwort, Sabline a Feuilles de Serpolet: Arenaria serpyllifolia var. serpyllifolia (Synonym: Arenaria serpyllifolia ssp. serpyllifolia) - Annual. Plants not matted, with one to several ascending or erect stems. Leaves ovate to lanceolate, much shorter than the internodes. Herbage with downward pointing hairs and gland-tipped hairs in the inflorescence.