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 Haworthia that is commonly cultivated as an ornamental.
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.
This is a variable species, and several forms and varieties are recognised. Several are listed below:
- Haworthia coarctata var. adelaidensis (Poelln.) M.B.Bayer; longer narrower leaves than type
- Haworthia coarctata var. coarctata; the type variety
- Haworthia coarctata f. chalwinii Haw.; leaves abnormally wide
- Haworthia coarctata f. greenii (Baker) M.B.Bayer; smooth leaves with tubercles mostly absent
- Haworthia coarctata f. tenuis (G.G.Sm.) M.B.Bayer; narrow stems and thinner leaves
|Wikimedia Commons has media related to Haworthia coarctata.|
- "Haworthia coarctata", World Checklist of Selected Plant Families, Royal Botanic Gardens, Kew, retrieved 2012-12-22
- Haworthia coarctata - Information page at Haworthia-Gasteria
- Haw., Philos. Mag. J. 66: 301 (1824).
- The Complete Book of Cacti and Succulents, By Terry Hewitt
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