Latin rigidus – stiff, referring to the leaves.

Perennial herbs with bulbs. Leaves 2-3, basal, pleated. Flowers each lasting one day. Perianth segments with broad claws, those of outer segments forming a deep cup. Inner segments much shorter,inrolled around a large nectary. Stamens joined in tube, protruding far beyond style. Style branches 3,opposite stamens, deeply 2-lobed, thickened.

4 species in Mexico.

Division or seed.

Cruden (1971).

Source: Cooke, D. (2005). Iridaceae. In: Spencer, R.. Horticultural Flora of South-eastern Australia. Volume 5. Flowering plants. Monocotyledons. The identification of garden and cultivated plants. University of New South Wales Press.