Complex sentence: The variety "candida" was described by Jakob Emanuel Lange in 1914 based on specimens he found in Denmark; variety "nigra" was named by Carleton Rea in 1922.
Split into simpler sentences: The variety "candida" was described by Jakob Emanuel Lange in 1914 based on specimens he found in Denmark. Variety "nigra" was named by Carleton Rea in 1922.