Caralluma rivae Chiov.
Riva's Caralluma
A succulent from the Horn of Africa described by Chiovenda and presumably dedicated to the explorer or botanist Riva, active in the Ethiopian-Somali region in the late 19th and early 20th centuries. Inhabits arid and semi-arid zones of Ethiopia and Somalia, generally at mid elevations (500–1,500 m a.s.l.), on stony or clay-stony soils. Stems are erect, quadrangular, dark green to glaucous, with moderate angular teeth. Flowers form compact cymes with a star-shaped corolla of dark lanceolate petals with adaxial hair.
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Overview
| Category | Classification |
|---|---|
| Family | Apocynaceae |
| Genus | Caralluma |
| Growth Habit | Erect caespitose herbaceous succulent. |
| Conservation Status | Data Deficient (DD); scarce records in international herbaria. |
| pH Target | 6.5–7.5 |
| Type | Stony, clay-stony, well-drained. |
Origin & Habitat
Requirements
Soil & Substrate
Type
Stony, clay-stony, well-drained.
groups Beneficial Associations
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Propagation Strategy
G
E
Every 3 years.
One dose in spring with highly diluted cactus fertilizer.
Uses & Applications
Precautions / Toxicity
No data; standard caution for Apocynaceae.
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"Poorly studied species; the few available herbarium specimens come mainly from Chiovenda's historical collections in Ethiopia and Somalia."
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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.