Ophionella arcuata (N.E.Br.) Bruyns

Stems 40-250 mm long, 3-8 mm thick. Pedicel 1-4 mm long, 0.75-1.00 mm thick. Corolla 5-14 mm long, 6-12 mm diam., bud-like to campanulate; outside glabrous and smooth, cream often suffused with pink; inside smooth, cream on lobes and mouth of tube changing abruptly to maroon lower in tube (sometimes with narrow cream patch around base of corona); tube 3-6 mm long, 2-7 mm broad at mouth, narrowly to broadly cupular, with corolla somewhat thickened at mouth; lobes 3.5-9.0 mm long, 2.0-4.8 mm broad at base, ascending and joined at tips to spreading, narrowly deltate to deltate, acuminate to acute, slightly convex inside. Corona 1.0-1.5 mm tall, 2-4 mm broad, raised on very short obtusely pentagonal stipe <0.5 mm long, bright yellow to cream, occasionally with maroon patches on sides of dorsal projection of inner lobes; outer lobes spreading, ± truncate with obtuse central thickened tooth joined laterally to prominent swollen truncate ascending to spreading projection behind anthers up to 1 mm long slightly exceeding height of style-head and often with tuberculate upper surface, <0.5 mm long; inner lobes 0.50-0.75 mm long, adpressed to backs of anthers and sometimes exceeding them to touch in centre, dorsiventrally flattened.