Haworthiopsis nigra
| Haworthiopsis nigra | |
|---|---|
| |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Monocots |
| Order: | Asparagales |
| Family: | Asphodelaceae |
| Subfamily: | Asphodeloideae |
| Genus: | Haworthia |
| Species: | H. nigra
|
| Binomial name | |
| Haworthia nigra | |
Haworthia nigra is a species of flowering succulent plant from the Western and Eastern Cape Provinces, South Africa.
Description and taxonomy
H.nigra grows its leaves in three tiers. The leaves, which are a very dark green to brownish black, are covered in dark tubercles, and are packed densely along its stems.
Within the genus Haworthia, the species forms part of the subgenus Hexangulares. More specifically, it falls within section Trifariae ("Three-tiered") together with its close relative Haworthia viscosa (and its other relatives Haworthia sordida, Haworthia scabra and Haworthia starkiana).
Recent phylogenetic studies have demonstrated that subgenus Hexangulares is actually relatively unrelated to other Haworthias (being more closely related to Gasterias. It will therefore comprise a new, separate genus, Haworthiopsis, and this species will accordingly become "Haworthiopsis nigra".[1][2]
References
- ^ Manning, John; Boatwright, James S.; Daru, Barnabas H.; Maurin, Olivier; van der Bank, Michelle. A Molecular Phylogeny and Generic Classification of Asphodelaceae subfamily Alooideae: A Final Resolution of the Prickly Issue of Polyphyly in the Alooids? Systematic Botany, Volume 39, Number 1, March 2014, pp. 55-74
- ^ http://www.haworthia.org.uk/haworthia.htm
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