Haworthiopsis glauca

Haworthiopsis glauca, formerly Haworthia glauca, is a species of flowering succulent plant from the Eastern Cape Province, South Africa.

Haworthiopsis glauca
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Asphodelaceae
Subfamily: Asphodeloideae
Tribe: Aloeae
Genus: Haworthiopsis
Species:
H. glauca
Binomial name
Haworthiopsis glauca
(Baker) G.D.Rowley[1]
Synonyms[1]
  • Haworthia glauca Baker
  • Catevala glauca (Baker) Kuntze
  • Haworthia reinwardtii subsp. glauca (Baker) Halda
  • Haworthia reinwardtii var. glauca (Baker) Halda

Description
The thin-stemmed jonesiae variety
The tubercles herrei variety
Detail of rosette of a young specimen with slightly in-curved leaves

H. glauca typically has pointed, light blue succulent leaves ("glauca" = "blue"), which are packed densely along its stems. The stems branch from the base, and the plant can form clumps.

The leaves of this variable species are sometimes incurved, sometimes vertical & erect, and sometimes spreading. In some varieties, the leaves have slight tubercles.

Among the more common varieties are var. herrei (with tubercles) and the gracile var. jonesiae (with pencil-thin stems).

Taxonomy

The species was previously included in Haworthia subgenus Hexangulares. Phylogenetic studies demonstrated that subgenus Hexangulares was actually relatively unrelated to other haworthias and so it was moved to the new genus Haworthiopsis.[2][3]

Distribution

This species extends across the western part of the Eastern Cape Province, South Africa. It can be found as far south as the vicinity of Port Elizabeth and westwards as far as Paardepoort near the border between the Western & Eastern Cape provinces.

Within this range, it typically grows in very well-drained sandy soil, either in direct sunlight, or under a bush or rocks which serve as partial protection from the sun.

References
  1. "Haworthiopsis glauca", World Checklist of Selected Plant Families, Royal Botanic Gardens, Kew, retrieved 2017-10-16
  2. 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
  3. http://www.haworthia.org.uk/haworthia.htm
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