Molinia caerulea subsp. caerulea 'Dauerstrahl'

Clump-forming deciduous grass about 90cm in height with narrow, linear, rich green leaves. Slender airy plumes of tiny dark purple flowers, on graceful, upright to gently arching, yellow-tinted, green stems, are held high above the foliage from summer to autumn, then turn orange-yellow by late autumn