Caralluma hexagona Lavranos
Six-angled Caralluma
A notably unusual species within the genus for having six-angled stems (instead of the usual four), a characteristic that gives it its specific name. Described by John Jacob Lavranos from material collected in Somalia and southern Oman. Some collections also recognise the variety septentrionalis, of more northerly distribution in the Arabian Peninsula, which shows minor differences in floral morphology. Flowers are brownish-yellow to green with dark mottling, with the typical fetid odour of stapeliads.
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© Sarah Stierch (Missvain), via Wikimedia Commons
CC BY 4.0
Overview
| Category | Classification |
|---|---|
| Family | Apocynaceae |
| Genus | Caralluma |
| Growth Habit | Clump-forming succulent with erect to semi-decumbent stems; stems of hexagonal cross-section, a diagnostic trait of the taxon |
| Conservation Status | Not formally assessed by IUCN; restricted and poorly known distribution |
| pH Target | 6.8–8.0 |
| Type | Arid rocky soil, well-drained, low in nutrients; tolerates calcareous coastal soils |
Origin & Habitat
Requirements
Soil & Substrate
Type
Arid rocky soil, well-drained, low in nutrients; tolerates calcareous coastal soils
groups Beneficial Associations
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Propagation Strategy
C
C
Every 2–3 years or when the plant completely fills the pot
Diluted cactus fertiliser once in spring; skip during the first two years after repotting
Uses & Applications
Precautions / Toxicity
No documented toxicity; flowers with fetid odour
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"Var. septentrionalis Lavranos, described from northern Oman and Yemen, has slightly narrower floral lobes. The hexagonal stem character is exceptional in the genus and facilitates identification in collections. Rarely cultivated species; mainly available in institutional botanical collections."
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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.