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Cathedral Window Haworthia
Haworthia cymbiformis
SA tree number
English: Cathedral Window Haworthia, Streak Haworthia, Boat-Leaf Haworthia, Windowed Boats
Afrikaans: Kliprosie
Synonyms: Haworthia cymbiformis var. cymbiformis forma ramosa, Haworthia ramosa
Varieties: Haworthia cymbiformis var. ramosa, Haworthia cymbiformis var. obtusa, Haworthia cymbiformis var. transiens
Haworthia cymbiformis, commonly known as Cathedral Window Haworthia or Kliprosie, is a small, succulent, perennial groundcover indigenous to the Eastern Cape. It forms dense clusters of rosettes, recognised by its distinctive fleshy, translucent-tipped leaves that allow light to penetrate the leaf interior, giving it a 'windowed' appearance.
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Distinguishing features:
Small succulent groundcover forming clusters of rosettes.
Leaves are fleshy, boat-shaped, and often light green.
Leaf tips are translucent (windowed).
Flowers are long, tubular, and whitish, on thin stems.
Grows mainly on rocky surfaces.
Overall appearance:
A relatively small, succulent groundcover plant that forms dense clusters of rosettes, often reaching up to 300 mm in diameter. Its succulent leaves help it endure harsh, dry conditions.
Height:
Typically reaches 5-10 cm in height.
Width:
Rosettes can spread to 10-15 cm in diameter.
Leaves:
Leaves are evergreen, succulent, and often light green.
They are broadly ovate to oblanceolate, soft, and form compact rosettes.
A striking characteristic is their translucent tips, also referred to as "leaf windows" or "cathedral windows," which allow sunlight to enter the leaf interior.
The leaves are typically boat-shaped, curving inward to a point.
They are densely packed and can be up to 25 in number per rosette for a related variety.
For a specific variety (H. cymbiformis var. ramosa), branches bearing leafy parts can be up to 150 mm long.
Flowers:
Flowers are long and tubular, whitish in colour, sometimes with a purplish-green midstripe.
They are typically borne on thin, erect stems (inflorescences) that can be up to 250 mm long.
There are usually 10–20 flowers in the upper half of the inflorescence.
Flowering season:
From mid-spring or early summer (mainly October to March in South Africa)
Fruits:
Small, dry capsules containing numerous seeds.
Seeds:
Seeds are small and light, described as "angular."
They are dispersed by wind and ideal for establishment in crevices.
Germination usually occurs within 14–21 days.
Soil type:
Prefers sandy-gritty soil that is dry or moderately moist.
Aspect: Prefers sunny to half-shady environments. Can tolerate low indoor light but grows best in bright, filtered sunlight. Direct afternoon sun can scorch leaves.
Uses:
Horticultural: Highly popular as an indoor plant due to its striking appearance and easy care. Excellent for rockeries, containers, miniature succulent gardens, terrariums, desk plants, and wall planters. It is described as a good filler plant due to its tendency to produce many offsets.
Ecological: Adapted to grow in rocky places, often in the shade of grasses or shrubs. Seeds are dispersed by wind.
Ecology:
Habitat: Primarily found on rocky surfaces, cliffs, and in crevices, often in the shade. It adapts to high summer temperatures and cannot survive frost or low winter temperatures.
Pollination: Knowledge of its pollinators is incomplete, but nectar sugar concentrations have been studied.
Seed dispersal: Seeds are light and angular, shaken from capsules and dispersed by wind.
Distribution and habitat:
Indigenous to South Africa, Haworthia cymbiformis is widespread between Gqeberha (Port Elizabeth), the Mbhashe River, and inland to Cathcart in the Eastern Cape. It is mainly found in the Succulent Karoo, Nama Karoo, and Albany Thicket vegetation types, and to a lesser extent in savanna, mostly in rocky places. One variety (H. cymbiformis var. ramosa) is specifically found on cliffs along the Keiskamma River in the Peddie District, Eastern Cape, at altitudes between 200–500 m.
Derivation of name:
The genus Haworthia was named after Adrian H. Haworth (1768–1833), an English botanist and succulent plant specialist.
The species name cymbiformis is Latin for 'boat-shaped', referring to the way the leaves curve inward and come to a point, resembling a boat.
Common names like "Cathedral Window Haworthia" refer to the translucent leaf tips that allow light into the plant, much like stained-glass windows. "Kliprosie" (Afrikaans) means 'rock rose', referencing its rosette shape and rocky habitat.
Historical aspects:
The genus Haworthia has been taxonomically challenging, with many names recognising variation over similarity, leading to confusion. It is a highly variable species that is difficult to distinguish from others, particularly Haworthia cooperi. The Red List classifies it as "Data Deficient - Taxonomically Problematic" because its risk of extinction cannot be properly assessed until its taxonomy is resolved.
Interesting facts:
This plant is basically a natural window display! Its leaves have special "windows" that are translucent, letting light into the plant's insides – how cool is that?
Ever heard of a "rock rose"? That's what the Afrikaans name, "Kliprosie," means, perfectly describing its rosette shape and its love for rocky hangouts.
Despite being a South African native, it's super popular worldwide as an indoor plant because it's pretty chilled out about light and water – perfect for beginner plant parents!
Growing tips:
Haworthia cymbiformis is an easy-to-grow succulent, ideal for beginners.
Plant it in well-draining, gritty soil, like a cactus or succulent mix. Good drainage is key.
Place it in bright, indirect light or semi-shade. Protect it from direct, hot afternoon sun to prevent leaf scorching.
Water sparingly. Allow the soil to dry out completely between waterings. Overwatering is the most common mistake. Reduce watering in winter when growth slows.
It tolerates high heat but may go dormant in peak summer, so water less during this period.
Fertilise lightly during its growing season (spring and summer) with a diluted succulent fertiliser if you want faster growth.
Easily propagated by dividing offsets (pups) that grow around the base, or from leaf cuttings (allow cuts to callous over).
Perfect for small pots, terrariums, or miniature succulent gardens.
This plant is a fantastic alternative for:
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