Tulista Marginatea, formerly Haworthia marginata, is a rare slow growing succulent. It forms stemless rosettes that produce erect to... xGasteraloe Flow - This slow-growing succulent forms a rosette made of sturdy green leaves with white bumps. Tulista opalina formerly Haworthia opalina is an attractive small succulent. It forms a rosette, consisting of thick fleshy, stiff, and light green leaves. xGasteraloe Twilight Zone’ is an attractive small succulent which forms rosettes of dark-green leaves with tiny white spots.