Lithops aucampiae L.Bolus
Aucamp's Living Stone
Lithops aucampiae is one of the most recognised and collected 'living stones' species, notable for its reddish-brown bodies with striking window patterns on the upper face that mimic the reddish stones of Kalahari and Northern Cape soils in South Africa. It was first described and collected by botanist and teacher Juanita Aucamp, in whose honour it is named. Its bright yellow flowers, emerging in autumn from the central fissure, contrast spectacularly with the dark body colouration.
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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 at ground level. Strict annual leaf replacement cycle: the old pair is nutritionally consumed by the new pair during the winter–spring rest phase. |
| Conservation Status | Least Concern (LC) per IUCN; broadly distributed across the South African Kalahari, though locally affected by intensive grazing and collection. |
| pH Target | 6.5 – 7.5 |
| Type | Ferruginous clay and stony Kalahari soils; rich in iron oxides giving the reddish colour, with excellent natural permeability. |
Origin & Habitat
Morphology
Fused leaf pair 2–3 cm in diameter and 1.5–2.5 cm tall, reddish-brown to dark brown with ochre tones. The upper surface is flat to slightly convex; the body is darker in colouration than most Lithops, reflecting the ferruginous Kalahari substrate.
ecoWell-developed windows with defined outlines, surrounded by dark channels, opaque islands, and dots faithfully reproducing the appearance of a fractured ferruginous stone. The pattern is diagnostic for the species and varies between subspecies and localities.
ecoDiurnal flowers 3–4 cm in diameter, deep yellow, fragrant; emerge from the fissure in autumn (October–November in Southern Hemisphere). Proportionally large relative to the body, making the flowering plant appear to 'burst' with colour.
ecoRelatively deep central fissure running across the upper face of the body. In autumn the flower emerges; during the leaf replacement phase (winter–spring), the new pair of leaves grows actively inside, consuming the reserves of the old pair as it desiccates.
ecoFleshy contractile roots that anchor the plant deeply in the substrate. Active contraction during drought pulls the body downward to minimise surface exposure and reduce water loss.
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Requirements
Soil & Substrate
Type
Ferruginous clay and stony Kalahari soils; rich in iron oxides giving the reddish colour, with excellent natural permeability.
groups Beneficial Associations
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Propagation Strategy
- 1 Sow in summer–autumn in very fine mineral substrate (sieved quartz sand), lightly moistened.
- 2 Maintain at 22–28 °C with a transparent cover; ventilate daily to prevent fungal issues.
- 3 Germinates in 1–2 weeks; remove cover progressively after 4–6 weeks.
- 4 Seedlings require slightly more moisture the first year; gradually reduce to the adult regime.
- 1 Perform division in autumn, when the new pair is fully formed and mature.
- 2 Separate bodies with sterilised scalpel ensuring roots on each section.
- 3 Air-dry 48 hours before planting in completely dry substrate.
Bury the body up to the fissure; reddish colouration intensifies with full sun exposure.
Confusing the shrinkage of the old pair during replacement with drought and watering: this invariably rots the new body.
Every 3–4 years; repot in autumn when the new pair is fully formed.
No fertilising; Kalahari soils are nutrient-poor and the plant is not adapted to rich substrates.
Uses & Applications
Precautions / Toxicity
Non-toxic to humans, dogs, and cats. No documented harmful active principles.
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Plant Health
Crown rot from watering during leaf replacement; the new body still forming is extremely vulnerable
Root mealybug (Rhizoecus spp.) hidden in the substrate; only detectable when repotting
Red spider mites in hot, low-humidity conditions; treat with low-toxicity contact acaricide
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"L. aucampiae was described by L. Bolus in 1929 from specimens collected by Juanita Aucamp, a schoolteacher in Postmasburg (Northern Cape) who located it among reddish Kalahari stones. It is an illustrative example of how chromatic mimicry in Lithops is not a uniform species-level phenomenon: the subspecies of L. aucampiae (subsp. aucampiae and subsp. euniceae) show differences in window patterns correlated with substrate type at their respective localities, evidencing active local adaptation."
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Scientific Integrity
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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.