Distribution and Ecology: (Fig. 6). Mountainous areas of Mexico and America, from states of Mexico, Guerrero, Oaxaca, and Veracruz south to Honduras and El Salvador. Dry ridges, Pinus and/or Quercus forests, Pinus, Quercus, and Liquidambar forests with Ulmus, Zinowiewia, Weinmannia, and Styrax, montane mixed forests, disturbed openings, and forest margins; frequently in sandy soil; 170-2500 m elev. Reported from forests of Pinus teocote, P. rudis, and P. oocarpa by Gómez-Pompa (1973). Flowering mid-February through April (early May).