Haworthiopsis coarctata

Haworthiopsis coarctata, formerly Haworthia coarctata, is a species of flowering succulent plant from the Eastern Cape Province, South Africa and naturalized in Mexico. It is one of the species of Haworthiopsis that is commonly cultivated as an ornamental.

Haworthiopsis coarctata
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Asphodelaceae
Subfamily: Asphodeloideae
Tribe: Aloeae
Genus: Haworthiopsis
Species:
H. coarctata
Binomial name
Haworthiopsis coarctata
(Haw.) J.D.Rowley[1]
Synonyms[1]
  • Haworthia coarctata Haw.
  • Aloe coarctata (Haw.) Schult. & Schult.f.
  • Catevala coarctata (Haw.) Kuntze
  • Haworthia reinwardtii var. coarctata (Haw.) Halda
  • Haworthia reinwardtii subsp. coarctata (Haw.) Halda
  • Haworthiopsis reinwardtii var. coarctata (Haw.) Breuer

Description

H. coarctata grows in large clumps in its natural habitat, with long stems packed with robust succulent leaves. It is normally dark green but sometimes acquires a rich purple-red when in full sunlight.

It is frequently confused with Haworthiopsis reinwardtii, which occurs just to the east of its natural range. However H. coarctata has smaller, smoother and rounder tubercles on its leaves (those of H.reinwardtii are sometimes larger, flatter and whiter). H. coarctata also usually has much wider, fatter leaves.[2]

Forms and varieties

This is a variable species, and several forms and varieties are recognised. Several are listed below:

  • H. coarctata var. adelaidensis (Poelln.) M.B.Bayer; longer narrower leaves than type
  • H. coarctata var. coarctata; the type variety
  • H. coarctata f. chalwinii Haw.; leaves abnormally wide
  • H. coarctata f. greenii (Baker) M.B.Bayer; smooth leaves with tubercles mostly absent
  • H. coarctata f. tenuis (G.G.Sm.) M.B.Bayer; narrow stems and thinner leaves

Cultivation

Haworthia coarctata has received the Royal Horticultural Society's Award of Garden Merit.[3]

  • H. coarctata var. greenii
  • H. coarctata var. chalwinii
  • H. coarctata var. tenuis
  • The dwarfed "bellula" form.

References
  1. "Haworthiopsis coarctata", World Checklist of Selected Plant Families, Royal Botanic Gardens, Kew, retrieved 2017-10-16
  2. Haworthia coarctata - Information page at Haworthia-Gasteria
  3. "Haworthia coarctata". www.rhs.org. Royal Horticultural Society. Retrieved 21 July 2020.
  • Haw., Phil. Mag. J. 66: 301 (1824).
  • The Complete Book of Cacti and Succulents, By Terry Hewitt
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