Complex sentence: The first person to name the species was Schumann in a 1890 paper in which he described three species: "Cereus microsphaericus", "C. obtusangulus" and "C. parvulus".
Split into simpler sentences: The first person to name the species was Schumann in 1890. In the same paper he described three species: "Cereus microsphaericus", "C. obtusangulus" and "C. parvulus".