Agave brittoniana Trel.
Britton's Agave
Agave brittoniana was described by William Trelease in honour of botanist Nathaniel Lord Britton, one of the great students of Caribbean flora. It is a Cuban endemic growing mainly in coastal and interior xeric scrublands of the centre and west of the island, on well-drained calcareous, serpentine and sandy soils. It forms medium to large rosettes with glaucous-blue to grey-green leaves, a robust reddish-brown terminal spine and regularly toothed margins. The species has suffered habitat reduction from agricultural expansion and coastal urbanisation, though it currently lacks a formal IUCN extinction-risk evaluation. Its cultivation as an ornamental in Caribbean and Florida gardens has contributed to its presence outside Cuba.
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Overview
| Category | Classification |
|---|---|
| Family | Asparagaceae |
| Genus | Agave |
| Growth Habit | Medium to large acaulescent to subcaulescent rosette, monocarpic; produces basal offsets at moderate frequency. |
| Conservation Status | Not Evaluated (IUCN). Cuban endemic; habitat pressure from agriculture and coastal urbanisation. Considered a priority species by Cuban botanists. |
| pH Target | 7.0–8.5 |
| Type | Calcareous, serpentine and sandy soils of the Caribbean coastline; very well-drained |
Origin & Habitat
Morphology
Lanceolate, 60–100 cm long × 10–15 cm wide at base; glaucous-blue to grey-green; surface with pronounced epicuticular wax; margins with regular horny teeth 4–7 mm separated 1.5–2.5 cm; terminal spine 4–6 cm, grooved, reddish-brown to black.
ecoTubular, 6–8 cm long, yellow to yellow-green; arranged in a spicate panicle on a scape 4–6 m tall; spring to summer flowering (March–July in Cuba); pollinated by nectarivorous bats and hummingbirds.
ecoShort and compact (acaulescent to subcaulescent), 10–20 cm; densely marked with leaf scars; medium-sized piña that accumulates carbohydrates for decades until flowering.
ecoMixed root system with main anchoring roots that penetrate calcareous cracks and shallow fibrous roots; adapted to thin and rocky soils of the Cuban coastline.
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Requirements
Soil & Substrate
Type
Calcareous, serpentine and sandy soils of the Caribbean coastline; very well-drained
groups Beneficial Associations
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Propagation Strategy
U
E
Every 3–4 years; prefers unglazed ceramic or terracotta containers to encourage lateral evaporation.
Light spring fertilisation with low-nitrogen fertiliser (NPK 5-10-10). Avoid excess phosphorus in calcareous soils where it is already naturally available.
Uses & Applications
Precautions / Toxicity
Mildly irritant. Epicuticular wax and sap may cause skin reactions in sensitive individuals. The terminal spine is particularly hazardous in coastal settings where unsuspecting visitors pass.
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Plant Health
Root rot (Phytophthora, Pythium) — risk in humid-climate collections; use highly porous calcareous substrate.
Mealybugs (Pseudococcus spp.) — common under stress conditions; control with isopropyl alcohol or systemic insecticide.
Agave snout weevil (Scyphophorus acupunctatus) — present also in Cuba and the Caribbean; monitor in summer and apply preventive imidacloprid.
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"A. brittoniana is one of the few agaves of island Caribbean origin and deserves greater attention in ex-situ conservation programmes. Its adaptation to alkaline and calcareous soils makes it an interesting candidate for Mediterranean and California-style gardens in northern Europe and California."
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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.