Vallicelli, Valentino (4 August 2013). "Ariocarpus trigonus". LLIFLE. Retrieved 2024-06-16. This article incorporates text from this source, which is available under the CC BY-SA 3.0 license.
Vallicelli, Valentino (4 August 2013). "Ariocarpus trigonus". LLIFLE. Retrieved 2024-06-16. This article incorporates text from this source, which is available under the CC BY-SA 3.0 license.