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It was formerly classed in the genus Haworthia, with the other large species (T. pumila, T. minima and T. marginata) in the "Robustipedunculares" subgenus. Following recent phylogenetic studies, it has been shown that these four species in fact constitute a distinct out-group, separate from other Haworthias.
As one of the soft green group of Haworthias it is frequently confused with its relatives (e.g. Haworthia cooperi which shares a similar distribution range, as well as Haworthia mucronata and Haworthia marumiana to the west). A distinctive feature is the soft, "boat-shaped" leaves ("cymbiformis" actually means "boat-shaped").
A. haworthii is native to the Canary Islands and northern Africa, but it has been introduced to other areas of similar climate, such as Southern California. [4] In the US, it is suitable to be grown outside in USDA hardiness zones 9-11. [5]
Haworthia maraisii is a species of flowering plant in the family Asphodeloideae, found in the southwest Cape Provinces of South Africa. It has been treated as a variety of either Haworthia magnifica or Haworthia mirabilis , but is accepted as a full species in the World Checklist of Selected Plant Families .
Haworthiopsis koelmaniorum (synonym Haworthia koelmaniorum) is a succulent plant in the subfamily Asphodeloideae, found in Mpumalanga, one of the Northern Provinces of South Africa. [ 1 ] References
Haworthia nortieri is a species of succulent plant belonging to the genus Haworthia and is classified under the family Asphodelaceae. It is native to Southern Africa, southwest of Northern Cape . [ 1 ]
In this form, it is similar to other retuse haworthias (e.g. Haworthia retusa, Haworthia bayeri, Haworthia springbokvlakensis, Haworthia pygmaea, Haworthia mirabilis and Haworthia magnifica). A distinctive feature is the convex shape of the leaf faces. The faces appear to bulge upwards, with the leaf tips bent back downwards.
Haworthia herbacea is a species of succulent plant in the genus Haworthia native to the Cape Province of South Africa. [1] Closely related to Haworthia reticulata, [2] it has greenish yellow leaves with small spines. As it matures the leaves get darker green and the white spots raise.