Herbae perennes, erectae, 19-26 cm altae; folia omnia basalia, disticha, aequitantia, lineari-ensiformia, glabra, purpurea, basim versus 15-22 cm longa, folia vetera annulum ex fibris constatum basim versus formantia;
scapus simplex, alatus, glaber, 17-24 cm longus, 0.5-1 mm latus, margine denticulatus versus apicem; spathae inaequales, geniculatae; tepala flava, elliptica, 8-10 mm longa, 2.5-4.5 mm lata; capsula nutans, sphaerica vel subsphaerica, glabra, 3.5-5 mm longa, 3-4 mm diametro; semina sphaerica vel subsphaerica, brunnea, 1-1.5 mm diametro, reticulata.
Sm, cui affinis, sed
scapus rubrus, rache inflorescentiae rubra, ramis lateralibus brevioribus, bracteis floriferis irregulariter sulcatis, floribus longioribus pallide flavidis et petalis longioribus differt.