Caralluma melanantha (Schltr.) N.E.Br.
Black-flowered Caralluma
South African succulent whose name directly refers to the colour of its flowers: 'melanos' (black) and 'anthos' (flower). Originally described by Rudolf Schlechter as Boucerosia melanantha and transferred to Caralluma by N.E. Brown. The flowers are very dark purple, almost black, with short papillae on the surface of the lobes; a feature that maximises olfactory and visual mimicry of decomposing carrion to attract fly pollinators. It grows in stony soils of South African semi-arid zones.
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Overview
| Category | Classification |
|---|---|
| Family | Apocynaceae |
| Genus | Caralluma |
| Growth Habit | Clump-forming succulent with erect quadrangular stems, up to 25 cm tall |
| Conservation Status | Not assessed by IUCN; endemic to South Africa |
| pH Target | 6.5–7.8 |
| Type | Very well-draining semi-arid stony soil, neutral to slightly alkaline pH |
Origin & Habitat
Requirements
Soil & Substrate
Type
Very well-draining semi-arid stony soil, neutral to slightly alkaline pH
groups Beneficial Associations
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Propagation Strategy
C
E
Every 2–3 years in spring
Diluted mineral fertiliser for succulents once in spring
Uses & Applications
Precautions / Toxicity
Not toxic; flowers produce a very intense carrion odour during anthesis
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"Described by Schlechter as Boucerosia melanantha; N.E. Brown combined it in Caralluma. The near-black colouration of its flowers results from a high concentration of anthocyanins, a character shared with very few other Caralluma. Species without verified images in freely accessible public photographic repositories."
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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.