Fl. rounded, 110mm wide, facing upwards; perianth segments 45mm long, roundish in outline, very broad, rounded at apex, mucronate, spreading, plane, with margins narrowly incurling, smooth and of membranaceous substance; the inner segments shouldered at base; corona 15mm long, bowl-shaped, ribbed, mouth expanded, wavy and lobed, with lobes overlapping, rim crenate. Mid-season to late.

Named at request of exhibitor/registrant.

There are no photos of "Thistledome" in Daffseek.