Lithops karasmontana (Dinter & Schwantes) N.E.Br.
Karas Mountains Living Stone
Lithops karasmontana, known as the 'Karas Mountains lithops', is a species native to the arid Karasburg Mountains in southern Namibia, where its whitish to beige bodies with intricate rusty patterns and tawny channels on the upper face blend with extraordinary effectiveness among the pale rocks and light gravel of the Namibian landscape. It stands out within the genus for producing white flowers rather than the typical yellow, making it one of the most sought-after species among specialist collectors. Its pale colouration reflects the extreme luminosity and high reflectance of Karasburg desert quartz soils.
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Overview
| Category | Classification |
|---|---|
| Family | Aizoaceae |
| Genus | Lithops |
| Growth Habit | Solitary or small-grouped succulent geophyte; body almost completely buried with the upper face flush with ground level. The very pale colouration is an adaptation to high solar reflectance of the habitat. Strict annual leaf replacement cycle. |
| Conservation Status | Least Concern (LC) per IUCN; distributed across a relatively wide range in Namibia though with locally small populations vulnerable to extraction. |
| pH Target | 6.0 – 7.0 |
| Type | Ground white quartz and high-reflectance quartzite gravel; extremely nutrient-poor, practically sterile soils with instant drainage. Characteristic of the Karas Mountains in southern Namibia. |
Origin & Habitat
Morphology
Fused leaf pair 2–4 cm in diameter, whitish, cream, beige, or very pale grey; the body is notably paler than most Lithops, making it extraordinarily cryptic among the white quartzite soils of Namibia.
ecoRelatively well-developed windows with complex patterns of rust-coloured channels, tawny brown, and whitish islands; the contrast between the pale background and the dark channels creates a very effective illusion of stone texture. The pattern varies considerably between varieties and localities.
ecoWhite to creamy-white flowers 3–4 cm in diameter, diurnal, with numerous linear petals and a slight fragrance; emerge from the central fissure in autumn (October–November in Southern Hemisphere). The white flowers contrast strikingly with the stony substrate and set this species immediately apart from most Lithops.
ecoClearly defined central fissure separating the two lobes; in many varieties it has a slightly darker tone than the body background, contributing to the visual effect of a crack in stone. Flowers and the new pair of leaves emerge from here each season.
ecoFleshy contractile roots that during the dry season pull the body downward, sinking it into the substrate to reduce surface exposure. In hard soils like those of Karasburg, roots may penetrate deeply into cracks between rocks.
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Requirements
Soil & Substrate
Type
Ground white quartz and high-reflectance quartzite gravel; extremely nutrient-poor, practically sterile soils with instant drainage. Characteristic of the Karas Mountains in southern Namibia.
groups Beneficial Associations
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Propagation Strategy
- 1 Sow in summer–autumn in very finely sieved white quartz substrate, very lightly moistened.
- 2 Maintain night temperature 18–20 °C and day temperature 25–30 °C with transparent cover; ventilate daily.
- 3 Germination in 1–3 weeks; seedlings are whitish, tiny, and fragile.
- 4 Remove cover progressively at 6–8 weeks; in the first year use slightly more moisture than for adults.
- 1 Divide only in autumn when the new pair is completely developed and mature.
- 2 Use sterilised scalpel; each division must include viable roots.
- 3 Callous in air 48–72 hours; plant in dry substrate and do not water for 1 week.
Use white quartz as surface top-dressing to maximise reflectance and keep substrate dry between waterings.
Watering when the body looks shrivelled during leaf replacement: shrivelling is the normal absorption process of the old pair.
Every 3–4 years or when bodies clearly exceed the pot limits; always in autumn, after complete leaf replacement.
Absolutely no fertilising; Karasburg soils are oligotrophic and the plant does not tolerate enriched substrates.
Uses & Applications
Precautions / Toxicity
Non-toxic to humans, dogs, and cats. No known clinical toxicity records.
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Plant Health
Root and crown rot from excess moisture or out-of-season watering — maximum risk during leaf replacement
Root mealybug (Rhizoecus spp.) in the substrate; only detectable when repotting or inspecting with a magnifier
Sunburn on the upper face if moved abruptly from indoors to full outdoor sun without progressive acclimatisation
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"The production of white flowers in L. karasmontana vs. the yellow typical of the genus is a phylogenetic rarity within Lithops. It has been speculated that white colouration may relate to different pollinators (possibly flies and smaller bees than the visitors of yellow flowers) or to greater light reflectance in the hyperarid Karasburg environment. The varieties and forms of L. karasmontana are numerous (var. karasmontana, var. lericheana, var. tischeri, among others) with subtle differences in pattern and background, making it an especially interesting taxon for advanced collectors."
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Scientific Integrity
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Sources
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Discussion
Disclaimer
This species record is provided for educational and informational purposes only. Jardín Roca Negra does not guarantee the accuracy or completeness of the data. Content is community-curated and may be subject to revision; it should not replace advice from a qualified botanist. This species may be toxic, invasive, or subject to legal restrictions — verify before handling or cultivating. Jardín Roca Negra accepts no liability for any harm arising from reliance on this information. Images are reproduced under Creative Commons or equivalent free licenses; credits are noted below each image.