Argyroderma citrinum L.Bolus
Lemon Argyroderma
Argyroderma citrinum L.Bolus stands out among species in the genus for producing bright lemon-yellow flowers, an unusual trait in Argyroderma where magenta and pink flowers predominate. Its name 'citrinum' directly refers to this characteristic citrine color. It is endemic to the South African Namaqualand, where it grows in white quartz fields alongside other mesembs.
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Overview
| Category | Classification |
|---|---|
| Family | Aizoaceae |
| Genus | Argyroderma |
| Growth Habit | Acaulescent solitary mesemb; ovoid body 2–4 cm formed by succulent opposite leaves. Silvery-grey surface. Lemon-yellow flowers, unique in the genus. Winter grower. |
| Conservation Status | No formal IUCN assessment; specialized habitat in Namaqualand quartz fields. |
| pH Target | 6.5–7.5 |
| Type | Very sandy or gravelly, extremely well-drained |
Origin & Habitat
Morphology
Pair of succulent leaves fused into an ovoid 2–4 cm body, silvery-grey and smooth.
ecoBright lemon-yellow flowers, 2–3 cm in diameter; key diagnostic feature of the species. Autumn–winter blooming.
ecoDeep and fibrous roots, adapted to dry quartzitic substrate.
ecoSmall silvery globular plant, indistinguishable from quartz pebbles until it blooms with striking yellow flowers.
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Requirements
Soil & Substrate
Type
Very sandy or gravelly, extremely well-drained
groups Beneficial Associations
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Propagation Strategy
- 1 Sow in fine quartzitic sand in autumn
- 2 Keep moist with mister
- 3 15–22 °C
- 4 Ventilate daily
S
Watering in summer
Every 3–4 years in autumn
Once a year in autumn, very diluted
Uses & Applications
Precautions / Toxicity
Non-toxic.
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Plant Health
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"The yellow flowers of A. citrinum make it identifiable even for non-specialized observers. This unusual coloration in the genus may be related to differences in the pollinators present in its specific microhabitat within Namaqualand, though no published studies confirm this."
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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.