stonecrop
Sedum ternatum

Hardiness: Zones 4 to 8
Plant type: Herbaceous perennial
Height: 4- 6"
Spread: 6- 9"
Sun: Full shade to full sun
Water: Medium
Bloom time: April to June
Bloom color: White
Soil: Clay-based, sandy, well-draining soils, shallow, rocky well-draining soils, neutral (≈7), alkaline (>7pH)

Notes: Easily propagated from cuttings placed in soil and kept moist.

More information on this plant here.