Argyroderma concinnum Schwantes
Neat Argyroderma
Argyroderma concinnum Schwantes is one of the most popular species of the genus in cultivation, appreciated for the compact and well-defined elegance of its globose body. Its name 'concinnum' (neat, elegant, well-proportioned) reflects the harmonious proportion of its fused leaves. Endemic to the South African Namaqualand and Richtersveld, it grows in white quartz fields where mimicry with pebbles is nearly perfect.
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Overview
| Category | Classification |
|---|---|
| Family | Aizoaceae |
| Genus | Argyroderma |
| Growth Habit | Acaulescent mesemb; spherical to ovoid body 2–4 cm, formed by very succulent opposite leaves. Uniformly silvery-grey surface, extremely smooth. Can form small clumps over time. Active growth from October to May. |
| Conservation Status | No formal IUCN assessment; distribution restricted to Namaqualand and Richtersveld, vulnerable habitats. |
| pH Target | 6.5–7.5 |
| Type | Very sandy or gravelly, extremely well-drained |
Origin & Habitat
Morphology
Perfectly proportioned globose body, 2–4 cm in diameter. Very smooth silvery-grey surface, no ornamentation. Narrow and well-defined apical fissure.
ecoFlowers 2.5–3.5 cm in diameter, deep magenta to bright pink. Emerging from the central fissure. Autumn–winter blooming.
ecoFibrous and deep root system; adapted to quartzitic mineral substrate.
ecoOne of the most symmetrical and aesthetically attractive species in the genus. Very popular in succulent collections for its perfectly globose form.
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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 on surface of very fine quartzitic sand without covering seeds
- 2 Keep moist with mister; cover with transparent film
- 3 Temperature 15–20 °C; diffuse light in first weeks
- 4 Ventilate briefly each day; transplant at 12 months
- 1 Only in autumn at start of active growth
- 2 Separate with clean scalpel and callous 2–3 days
- 3 Plant in mineral sand; do not water until visible activity
I
Watering in summer
Every 3–4 years in autumn
Very diluted mineral fertilizer once in autumn; never in summer
Uses & Applications
Precautions / Toxicity
Non-toxic to humans or domestic animals.
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Plant Health
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"A. concinnum is frequently the first Argyroderma acquired by novice collectors, thanks to its availability in specialized nurseries and its perfectly globose form. Schwantes described it as the most 'neat' and symmetrical example in the genus, which explains the epithet 'concinnum'."
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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.