Cacalia ficoides L.
Blue Chalk Fingers
Cacalia ficoides L. is the historical basionym of Curio ficoides, a trailing or mat-forming succulent from the South African Western Cape. Described by Linnaeus in 1753, it is the first valid publication of this species' name. Its leaves are cylindrical, turgid, and a characteristic glaucous silvery-blue, earning it the popular name 'blue chalk fingers'. It is one of the most versatile and resilient mat-forming succulents for Mediterranean and xeric gardens.
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© Krzysztof Ziarnek, Kenraiz, CC BY-SA 4.0, via Wikimedia Commons
CC BY-SA 4.0
Overview
| Category | Classification |
|---|---|
| Family | Asteraceae |
| Genus | Cacalia |
| Growth Habit | Perennial trailing or mat-forming succulent, rhizomatous |
| Conservation Status | Not threatened (IUCN); widely cultivated and naturalized worldwide |
| pH Target | 6.5–8.5 |
| Type | Sandy, calcareous, well-drained; neutral to alkaline pH |
Origin & Habitat
Requirements
Soil & Substrate
Type
Sandy, calcareous, well-drained; neutral to alkaline pH
groups Beneficial Associations
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Propagation Strategy
V
E
Every 2–3 years in pots; no repotting needed in the ground
Diluted mineral fertilizer once in spring; excessive fertilization reduces foliage quality
Uses & Applications
Precautions / Toxicity
Toxic to domestic animals if ingested in large quantities; contains pyrrolizidine alkaloids
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"The name Cacalia ficoides L. (1753) is the basionym: the first validly published name for this species. It is the nomenclatural basis for all later combinations. The modern accepted name is Curio ficoides (L.) P.V.Heath (1999). Complete synonymy includes: Kleinia ficoides (L.) Haw. (1812), Senecio ficoides (L.) Sch.Bip. (1845), and Cacalia dulcis Salisb. (1796, heterotypic synonym). The species was transferred to genus Curio by Paul V. Heath in 1999 when segregating cylindrical-leaved succulents from Senecio."
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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.