Ipomoea violacea
Ipomoea violacea is a perennial species of "Ipomoea" that occurs throughout the world with the exception of the European continent. It is most commonly called beach moonflower or sea moonflower as the flowers open at night. Description. The corolla of the flower of "Ipomoea violacea" is white, distinguishing this species from "Ipomoea tricolor", commonly called "Heavenly Blue". It is sometimes mistaken for the cultivar "Pearly Gates", the corolla of which is also white, probably because of its misleading Latin binomial name, "Ipomoea violacea", "violacea" meaning purple. Comparative taxonomies. A comparison of the taxonomy of the two plants shows  that they belong to different Subgenera, consequently, "Ipomoea violacea" should not be used as a synonym for "Ipomoea tricolor". In exceptional cases where "Ipomoea violacea" has to be used as a synonym of "Ipomoea tricolor", one must specify the incorrect usage by using the abbreviation 'Auct.' for "Auctorum". Ipomoea violacea: Ipomoea tricolor: LSA presence. The Native Americans of Mexico are known to have long used the seeds of species of "Ipomoea" for preparing psychedelic infusions; several scientific studies indicate they contain several ergoline alkaloids with effects somewhat similar to, but weaker than, those of LSD It is possible that some  of these studies may have mistaken "Ipomoea violacea" for "Ipomoea tricolor", e.g., works published in the scientific journal "Phytochemistry" and quoted by the "Sociedade Brasileira de Farmacognosia", which purportedly showed the presence of Ergine, also known as d-lysergic acid amide (LSA) in "Ipomoea violacea". The discoverer of LSD, Albert Hofmann, himself misleads the reader in his book "Plants of the Gods: Their Sacred, Healing, and Hallucinogenic Powers" by describing "Ipomoea tricolor" (the flower shown in the book is clearly one of "Ipomoea tricolor", heavenly blue), but is labeled as "Ipomoea violacea". As specified in the upper section of its  description, "Ipomoea violacea's" corolla is white only. Because studies on the presence of LSA in "Ipomoea violacea" do not specify the complete taxonomy of the plant, it cannot be certain that "Ipomoea violacea" contains d-lysergic acid amide. As of 2016, only "Ipomoea tricolor" is proved to contain LSA in its seeds.