Boucerosia quadrangula (Forssk.) Decne.
Four-angled Caralluma
Boucerosia quadrangula (Forssk.) Decne. is the historical name for this Arabian Peninsula succulent whose currently accepted name is Caralluma quadrangula (Forssk.) N.E.Br., or in some classifications Monolluma quadrangula. It has prominently angled tetragonal stems, green to greyish, with dark 5-petalled flowers of fetid aroma. It inhabits rocky and sandy arid zones of Yemen, Saudi Arabia and the Horn of Africa.
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Overview
| Category | Classification |
|---|---|
| Family | Apocynaceae |
| Genus | Boucerosia |
| Growth Habit | Perennial succulent, erect, with markedly tetragonal stems and sharp teeth on the ridges |
| Conservation Status | Least Concern (LC) across most of its range |
| pH Target | 7.0–8.5 |
| Type | Sandy, gravelly, alkaline |
Origin & Habitat
Requirements
Soil & Substrate
Type
Sandy, gravelly, alkaline
groups Beneficial Associations
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Propagation Strategy
V
W
Every 3 years
Very diluted cactus fertilizer once a year in spring
Uses & Applications
Precautions / Toxicity
Contains active glycosides; moderately toxic if ingested in quantity
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Plant Health
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"Classification in Monolluma vs Caralluma is controversial; Plants of the World Online currently accepts Monolluma quadrangula. Research on its secondary metabolites (Quadrangulosides) is of pharmacological interest."
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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.