Coulteria lewisiae (Leguminosae: Caesalpinioideae) a new species for Infiernillo region, Mexico Author Sotuyo, Solange Departamento de Botánica, Instituto de Biología, Universidad Nacional Autónoma de México. Circuito Exterior s / n, Ciudad Universitaria, Copilco, Coyoacán. A. P. 70 - 367 México, Distrito Federal. C. P. 04510. Author Contreras-Jiménez, José Luis Facultad de Arquitectura, Benemérita Universidad Autónoma de Puebla. 4 Sur 104. Col. Centro. CP 72000. CP 72590. Puebla, Puebla. text Phytotaxa 2021 2021-04-30 498 3 220 226 http://dx.doi.org/10.11646/phytotaxa.498.3.8 journal article 10.11646/phytotaxa.498.3.8 1179-3163 5424289 Taxonomic key 1. Trees or shrubs in the Rio Balsas Depression and Tehuacan-Cuicatlan Valley, Mexico ....................................................................2 - Shrubs or small trees from the North and Bajio regions of Mexico ...................................................................................................3 2. Tree; leaflets glabrescent on the adaxial surface, pilose to pubescent on the abaxial surface, ovate-elliptic, 2.5—5.6× 1.5—2.5 cm ; legume 7.3–12.6 × 2.8–4.4 cm , oblong-elliptic, margin hirtule, 1—5 seeded; tropical deciduous forest in Guerrero and Michoacan , Mexico ................................................................................................................................................................................ C. lewisiae - Shrub; leaflets tomentulose, orbicular, 0.9–2.6 × 0.9–1.5 cm ; legume 3.7–7.2 × 1.9-3.2 cm , oblong-elliptic, tomentulose, 2–3 seeded; in deciduous tropical forest in the Tehuacan-Cuicatlan Valley ( Puebla and Oaxaca ) ........................... C. rosalindamedinae 3. Shrubs or small trees; leaflets densely pubescent below, obovate, 1.7–8.5 × 1.2–4.5 cm ; legume 5–7 × 2.5–3 cm , oblong to elliptic, mucronate, densely pubescent on both surfaces, 1–3-seeded; in dry forest and bushland, in Hidalgo , Queretaro , San Luis Potosi , Tamaulipas and Guanajuato , Mexico (Bajio and Northwest of Mexico ).......................................................................... C. pringlei - Tree; leaflets glabrous, oblong-lanceolate, 3–6 × 1.5–3 cm ; legume 7–14 × 3–4 cm , oblong, glabrous, 2-3 seeded; in low rocky bluffs in dry seasonal forest ( Colima and Jalisco )................................................................................................................ C. glabra