King's Arenaria - Arenaria kingii
Perennial from a loosely branched caudex, forming loose mats. Stems erect, simple, 10–30 cm. Leaves filiform, sparsely short-hairy, 1–2 cm long, shorter below. Inflorescence several-flowered, open, glandular (sparsely). Flowers: sepals glabrous to glandular, narrowly ovate with an acute tip, broadly scarious-margined with a deep green center, 3–6 mm long; petals spatulate, sometimes lobed, 5–7 mm long. Capsules glabrous, 4–7 mm long. Our plants are variety glabrescens (S. Watson) Maguire (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)
Rocky soil of open slopes in the subalpine and alpine zones.