The primary LSA containing Morning Glories all belong to the species Ipomoea violacea (also called Ipomoea tricolor or Ipomoea rubro-caerulea). Within this species, the 4 varieties known to contain LSA are "Heavenly Blue", "Pearly Gates", "Flying Saucers", and "Blue Star". Other varieties may also contain LSA, though generally in quantities too low to be useful as a psychoactive.
Morning Glories are an annual vine with ovate, deeply cordate leaves 3-4 inches long and 3/4-3 inches wide. The trumpet-shaped flowers vary from white to red, purple, blue, or violet-blue. The ovoid fruit is about 1/2 inch in length and bears elongate, angular black seeds.