Xerophyllum asphodeloides is a perennial known commonly as mountain asphodel with narrow, grass‑like leaves reflected in names such as grass‑leaved helonias. It favours sunny to partially shaded sites and performs best in sandy, well‑drained soils of acidic to neutral pH. The plant tolerates a range of moisture from moist to dry, making it suitable for lean, free‑draining ground. It flowers in June to July.

Mountain asphodel (Xerophyllum asphodeloides) is a grass‑leaved perennial for full sun or partial shade on sandy, well‑drained, acidic to neutral soils.

https://en.wikipedia.org/wiki/Xerophyllum_asphodeloides

Xerophyllum asphodeloides

Mountain asphodel | Xerophyllum asphodeloides

Xerophyllum tenax is a perennial herb producing erect flowering stems to about 1.2 m. It prefers full sun and moist but well-drained sandy or loamy soils. Flowering in the UK occurs in June to July. It is valued for use on gravel banks and in naturalistic plantings where its height helps with erosion control.

Bear grass (Xerophyllum tenax) is a perennial with erect flower stems to about 1.2 m that blooms in the UK from June to July.

https://en.wikipedia.org/wiki/Xerophyllum_tenax

Xerophyllum tenax

Bear grass | Xerophyllum tenax

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