BOOLEANUM B.L.Turner, 1996
Distribution : Mexico (Nuevo Leon), on gypsum hillsides, 1340 m.
Description (according to 't Hart & Bleij in IHSP, 2003):
Perennial (?) herbs with fibrous roots, 5 - 8 cm tall.
Stems 3-4 mm in diameter near the base when dry, papillose.
Leaves alternate, ovate when dry, 7-10x3-4 mm, gradually becoming smaller towards the stem tips, soon deciduous near the stem bases, somewhat overlapping and covering the stem axis.
Inflorescences terminal with short circinnate branches, 5- to 10-flowered, congested.
Flowers : Sepals 5, ovate, glabrous, petals ±3x1.5 mm, free to the base, red, with a dorsal keel, stamens 5, alternate with the petals, 3 mm, anthers yellow.