Dietes grandiflora N.E.Br.

Plants mostly 1.1-1.5 m high. Stem erect, irregularly branched, bearing short, entirely sheathing bract-like leaves at upper nodes 25-50 mm long, apices obtuse apiculate. Foliage leaves 750-1000 mm long, ± linear, 10-15(-20) mm wide. Rhipidial spathes obtuse to emarginate; inner 50-80 mm long, outer ± half as long. Flowers white, outer tepal limbs with velvety, yellow nectar guides at bases and dotted on claws, inner tepals streaked dark brown either side of white midline, style branches pale blue-mauve; outer tepals mostly 45-60 x 25-35 mm, claws 20-26 mm long, with a dense yellow beard along midline, limbs spreading or curving down distally; inner tepals (36-)40-45 x 22-25 mm, limbs spreading. Stamens free; filaments 10-13 mm long, broad and contiguous at bases tapering to slender upper half; anthers 7-10 mm long. Ovary 13-16 mm long; style ± 5 mm long, branches 12-20 x 6-8 mm, crests 12-15 mm long. Capsules ± ellipsoid, 28-45(-50) mm long, ridged and furrowed vertically. Seeds angular, dark brown.

Can be grown by divisions or seedlings.