Leslie's Living Stone

Lithops lesliei is endemic to South Africa.

• Found in the provinces of Gauteng, Mpumalanga, Limpopo, and the North West (formerly Transvaal)
• Occurs at elevations of approximately 1,000 to 1,700 meters
• Grows on exposed, sun-baked quartzite, granite, and sandstone gravel flats in grassland and savanna transitions
• The species inhabits areas receiving approximately 400 to 600 mm of annual rainfall, mostly in summer
• First described by the South African botanist Nicholas Edward Brown in 1912
• South Africa is the center of diversity for the genus Lithops, with approximately 37 species occurring almost exclusively within its borders
• The species has a relatively broad distribution compared to many Lithops species, some of which are restricted to a single hilltop

A small, solitary or slowly clumping succulent consisting of paired, fused leaves.

Body:
• Each plant body consists of a pair of thick, fleshy, hemispherical to conical leaves, 2 to 4 cm tall and 2 to 5 cm wide
• Fissure (the slit between the two leaves): deep, V-shaped to U-shaped, typically white or pale
• Upper surface (face): flat to slightly convex, intricately patterned with windows, channels, ridges, dots, and lines in shades of brown, green, gray, cream, and reddish-orange
• The patterns and colors serve as camouflage, mimicking the surrounding stones and gravel
• Sides: smooth, greenish to brownish or grayish
• Old leaf pairs shrivel and dry as new ones emerge from the fissure each year

Flowers:
• Daisy-like (asters), 2 to 4 cm in diameter — often larger than the plant body itself
• Bright golden yellow (in var. lesliei) or white (in var. burchellii)
• Appear from the fissure in autumn to early winter
• Scented sweetly, opening in the afternoon and closing at night
• Each plant produces a single flower

Fruit:
• A small, multi-chambered capsule that opens when wetted (hydrochastic), releasing tiny seeds
• Capsules can remain viable for many years

Inhabits exposed, rocky terrain in the summer-rainfall regions of northeastern South Africa.

• Grows fully exposed on sun-baked gravel flats among quartzite and granite chips, which the plants closely mimic
• The windowed upper surface allows light to penetrate into the interior of the leaf, where chlorophyll-bearing cells conduct photosynthesis while the plant remains partially buried
• Flowers are pollinated by small bees, wasps, and flies
• The hydrochastic fruit capsules open only when wetted by rain, timing seed release to favorable conditions
• Plants spend much of their lives nearly flush with or even slightly below the soil surface, with only the patterned face visible
• Root system is a long taproot that reaches deep moisture reserves
• Adapted to survive without water for many months; the old leaf pair sustains the plant while the new pair develops within

Lithops lesliei is currently classified as a species of Least Concern (LC) on the IUCN Red List, though it faces increasing pressure in parts of its range.

• Although relatively widespread compared to many Lithops species, local populations are threatened by urban expansion, mining activity, and overgrazing
• Illegal collection by succulent enthusiasts poses a significant threat to accessible populations
• The genus Lithops as a whole has experienced dramatic population declines, with several species now critically endangered
• All Lithops species are protected under South African biodiversity legislation
• Listed on CITES Appendix II, which regulates international trade
• Habitat degradation due to agriculture and infrastructure development continues to reduce available habitat
• Conservation efforts include protected area management, seed banking, and ex-situ cultivation programs

Light:
• Requires very bright light to full sun for compact growth and proper body coloration
• Insufficient light causes the plant to become elongated, lose its camouflage patterns, and rot easily
• Morning sun with some afternoon shade is ideal in very hot climates

Soil:
• Requires extremely well-draining, mineral-based substrate
• Use a mix of coarse sand, pumice, perlite, and a very small amount of organic material (no more than 10 to 20%)
• The soil should mimic the gritty, poor conditions of the natural habitat
• Never use peat-based or water-retentive soils

Water:
• The most critical aspect of Lithops care — watering must follow strict seasonal rhythms
• Summer: water very sparingly only when the plant shows slight wrinkling
• Autumn: water when flower buds appear and the plant is actively growing
• Winter: do not water at all while the new leaf pair is developing inside the old one
• Spring: resume light watering only after the old leaf pair has completely dried up
• Overwatering is fatal — it causes the plant to burst or rot

Temperature:
• Hardy to approximately -2°C for brief periods if bone dry
• Best growth at 20 to 30°C in summer
• Appreciates warm days and cool nights

Propagation:
• Primarily from seed; plants rarely produce offsets
• Sow seeds on the surface of sterile, sandy medium in autumn
• Keep moist until germination (typically 7 to 14 days)
• Seedlings are tiny and grow very slowly, taking 3 to 5 years to reach flowering size