Haworthia coarctata

Haworthia coarctata
Scientific classification
Kingdom: Plantae
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Xanthorrhoeaceae
Subfamily: Asphodeloideae
Genus: Haworthia
Species: H. coarctata
Binomial name
Haworthia coarctata
Haw.[1]

Haworthia coarctata is a species of flowering succulent plant from the Eastern Cape Province, South Africa and naturalized in Mexico.[1] It is one of the species of Haworthia that is commonly cultivated as an ornamental.

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 Haworthia 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[1]

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

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

  1. 1 2 3 "Haworthia coarctata", World Checklist of Selected Plant Families, Royal Botanic Gardens, Kew, retrieved 2012-12-22
  2. ↑ Haworthia coarctata - Information page at Haworthia-Gasteria


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