Orbea gerstneri subsp. elongata (R.A.Dyer) Bruyns

Succulent forming clump 100 mm to 1 m diam. Stems 30-100 mm long, 6-20 mm thick (excluding teeth), stout, sometimes rhizomatous for up to 100 mm; tubercles 4-9 mm long, joined into 4 obtuse angles along stem with slight to broadly concave groove between angles, tapering into spreading deltoid acute laterally flattened tooth sometimes with fine ascending denticles near apex. Corolla 35-60 mm diam.; tube 7-9 mm long, 8-9 mm broad, pentagonal to circular at mouth but distinctly pentagonal towards base with sepals resting on angles of pentagon outside, inside with small translucent-white papillae on otherwise purple-brown background, corolla thickened around mouth sometimes into slightly raised annulus; lobes sometimes becoming greenish towards tips. Outer corona lobes 5-6 mm long, steeply ascending against sides of corolla tube.