The surrounding of Jamauve is bordered by high mountains of the Eastern Siera Madre, thus the climate of the region is rather dry. Nevertheless, the region is highly interesting in a botanical view as the flora diversity is among the highest in the region. The surrounding of San Vicente is famous on the Obregonia denegrii and Ariocarpus trigonus populations. There were hardly any leaves on the bushes due to the dry season. Obregonia denegrii does not tolerate direct sunshine in culture, according to the observations of the Author, thus the light shading of the bushes may be important for the plants on the field also. The population consist of more than one hundred individuals, thus the habitat is adequate for them. North from this side there are agricultural lands, next to the river. The trees were cut down. Nevertheless, smaller plants remained in the place. Obregonia denegrii individuals also survived, but they were highly stressed but to the direct irradiation. Into the direction of Jamauve, there is a population of Ariocarpus trigonus, which is also mentioned by Czech authors as A. t. var. minor, or var. horacekii. Obregonia denegrii was also found under bushes. Close to San Antonio, there is a further Ariocarpus trigonus population. The individuals were damaged by animal husbandry, but the injuries were not hard. The population consist of approximately 50 individuals, from seedlings to old specimens. Close to Altamira, on limestone dominated soil, the Author found Ariocarpus retusus specimens in grass vegetation. The soil was mainly limestone particles, which was coloured black by some dried organic soil material. Next to Miqihuana, the Author found a Turbinicarpus schmiedickeanus population, of which individuals were pulled back into the soil due to the dry season. Nevertheless, some Ariocarpus retusus were also found. In the surrounding of Doctor Arroyo, a population of Pelecyphora strobiliformis was found. The individuals were hard to find for the first, but later on a large number of plants were seen in a high population density. The Author noticed seedlings, young plants and old specimens as well - altogether more than one thousand plants were seen in the swallow limestone soil. Ariocarpus retusus (typical furfuraceus form) was also found on the place.
