Stems to 4.1 dm × 1-4.6 mm. Leaf blades 1.5-4.5 mm wide distal to midlength. Spathes 4.3-7 mm wide, outer 2-6.2 cm; hyaline margins 0.2-0.5(-1.6) mm wide, extending to just proximal to, or occasionally exceeding, green apex. Tepals 12.5-33 mm; filaments 6-12.2 mm; anthers 3-10.2 mm; ovary 2-5.6 mm; pedicel 2-3.8 cm. Capsules 4.5-11.3 mm. 2n = 64.