QUADRIPETALUM R.T. Clausen, 1977
Distribution : Mexico (Durango), ± 2500 m.
Description (by 't Hart & Bleij in IHSP, 2003) :
Biennial herbs with tuberous roots and tiny rosettes with a small subterranean corm.
Leaves alternate, spatulate, obtuse, petiolate, 17 - 21 x 6 - 8 mm.
Flowering branches erect or ascending, papillose, reddish-brown or greenish, sometimes branched.
Inflorescences cymes with 3 branches.
Flowers 4-merous, long pedicellate, sepals basally free, shortly spurred, unequal, clavate-oblanceolate, rounded or truncate, 3 - 4 mm, spreading, petals free, ovate, mucronate, cucullate, reddish, ± 3 mm, first spreading then recurved, anthers pale yellow.
Cytology : n = 22.