Synonyms
Haworthia schmidtiana var. suberecta Poelln.
Haworthia nigra f. angustata (Poelln.) Pilbeam
Haworthia schmidtiana var. pusilla Poelln.
Haworthia schmidtiana Poelln.
Haworthia ryneveldii Poelln.
Haworthia nigra var. elongata (Poelln.) Uitewaal
Haworthia nigra var. schmidtiana (Poelln.) Uitewaal
Haworthia nigra var. suberecta (Poelln.) Uitewaal
Haworthia schmidtiana var. angustata Poelln.
Haworthia schmidtiana var. elongata Poelln.
Haworthia nigra var. angustata (Poelln.) Uitewaal
Haworthiopsis nigra var. elongata (Poelln.) G.D.Rowley
Haworthia nigra var. pusilla (Poelln.) Uitewaal