ballhead sandwort (Arenaria congesta)

0408971 Ballhead Sandwort [Arenaria congesta]. Umatilla NF Summit Rd, OR. © Mark Turner

0408971 Ballhead Sandwort [Arenaria congesta]. Umatilla NF Summit Rd, OR. © Mark Turner

Common name: ballhead sandwort
Botanical name: Arenaria congesta

Light: Full sun
Height: 6 – 12 inches
Water: low, drought tolerant
Soil type: well-drained sandy to rocky soils

Perennial alpine wildflower with fine leaves (grass-like) with clusters of small white 5-petalled flowers in midsummer; great plant for borders; forms clumps