Hypericum prolificum, Shrubby St. John's wort

Shrubby St. John's Wort
Hypericum prolificum

Hardiness: Zones 3 to 8
Plant type: Shrub
Height: 1-5'
Spread: 1-4'
Sun: Part shade to full sun
Water: Medium
Bloom time: June to August
Bloom color: Yellow
Soil:  Average, medium, well-drained soil. Tolerates wide range of soils, including dry rocky or sandy soils. Also tolerates some drought.

Notes: Plants of the genus Hypericum (some species have been used since ancient times in the treatment of wounds and inflammations) were apparently gathered and burned to ward off evil spirits on the eve of St. John's Day

More information on this plant here.