Luzula acuminata

Sizes available: Landscape plug

Basics: zones 3-8, 4-12" x 18-24", part sun to full shade, subtle, yellowish-green bloom in mid to late spring, prefers some moisture and richness, but very adaptable as to soil type and drought tolerant in shade 

Common names: Hairy Woodrush

Origin/Distribution: southern Canada and central and eastern U.S. Native to Maine

Habitat: wooded slopes, forest clearings, medium (mesic) to dry soils,  forest understory in mixed deciduous woodlands

More: this is an excellent and underused rush that works well as part of a shady, low-growing matrix. I think it has ground cover (living mulch) potential as well.