hillside slope with calcareous gravels on over white blocky limestone outcrops. An exceptionally rich and diverse flora site less than 100 yards east of Coahuila state line.
grassy slope of volcanic rhyolite tuff rubble just below cliffs at upper canyon rim. This old switchback road has now been replaced with a new paved highway to Batopilas that greatly limits access to many former rich roadside collecting sites in the canyon.
Category hierarchy: Interactions Among Species | Defense: Poisons & MoreDescription: Pricky-pear cactus. Two pads have dead tips.Original date: 20020701Locality: Latitude: 3.955010000000000e+001; Longitude: -1.057820000000000e+002
