Tulista margarita (formerly Haworthia marginata) is a rare slow-growing succulent. It forms stemless rosettes of erect-to-... xGasteraloe Flow, a slow-growing succulent, forms a rosette with sturdy, deep-green leaves that are covered in white bumps. Tulista opalina was formerly called Haworthia opalina. It is a small succulent which forms a rosette consisting of thick, fleshy, stiff and light green leaves. xGasteraloe 'Twilight Zone' is an attractive small succulent that forms rosettes of dark green leaves with tiny white spots.