Agave scabra Salm-Dyck
Rough-Leaf Agave
Agave scabra (rough-leaf agave) is a medium to large species native to the Chihuahuan Desert of northeastern Mexico (Coahuila, Nuevo León, Tamaulipas, Durango, Zacatecas) and the extreme south of Texas. Its leaves are notably rough to the touch—hence the epithet scabra ('rough')—with a characteristic bluish-grey glaucous coloration and robust marginal teeth. Some authors treat it as a synonym of A. asperrima Jacobi, but Plants of the World Online (POWO/Kew) recognizes it as a valid species. It is an ecologically important component of the Chihuahuan Desert, as its nectar and flowers support migratory bats, moths, and hummingbirds.
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Overview
| Category | Classification |
|---|---|
| Family | Asparagaceae |
| Genus | Agave |
| Growth Habit | Acaulescent to short-stemmed rosette, typically solitary or with few offsets. Leaves reach 60–120 cm long and 10–18 cm wide. Mature rosette can exceed 1.5 m in diameter. Inflorescence a panicle 5–9 m tall. |
| Conservation Status | Least Concern (LC) globally; locally may be pressured by illegal extraction for artisanal mezcal. Some Texas populations are protected. Not listed under Mexico's NOM-059-SEMARNAT. |
| pH Target | 6.5–8.0 |
| Type | Sandy to sandy loam, very well-drained, tolerant of calcareous soils |
Origin & Habitat
Morphology
Lanceolate to ovate-lanceolate, 60–120 cm long and 10–18 cm wide, bluish-glaucous to ash-grey green. Adaxial and abaxial surfaces clearly rough (scabrous). Margins with corneous teeth 5–10 mm long, dark brown to black; apical spine 3–6 cm long, robust, with adaxial groove.
ecoOpen panicle 5–9 m tall with lateral branches bearing clusters of 3–5 flowers. Yellow to greenish-yellow flowers 7–10 cm long, with strongly exserted stamens. On the night of anthesis, the sugary nectar attracts bats of the genus Leptonycteris.
ecoAbsent or very short (up to 20 cm in old specimens). The central caudex accumulates large quantities of fructans; this reserve has made the species a potential source of mezcal in northeastern Mexico.
ecoDeep and lateral root system, adapted to the stony substrate of the Chihuahuan Desert. Fibrous roots can reach up to 2 m deep in sandy soils, enabling water uptake after sparse rainfall.
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Requirements
Soil & Substrate
Type
Sandy to sandy loam, very well-drained, tolerant of calcareous soils
groups Beneficial Associations
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Propagation Strategy
P
O
Every 5–8 years; prefer permanent in-ground planting when possible
Generally unnecessary; if desired, a low-nitrogen fertilizer (5-10-10) once in spring
Uses & Applications
Precautions / Toxicity
Long apical spines and sharp marginal teeth pose mechanical injury risk. Sap may cause contact dermatitis in sensitive individuals. No significant systemic toxicity reported for humans or livestock.
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Plant Health
Crown rot caused by Phytophthora cinnamomi in persistently moist conditions
Long-tailed mealybug (Pseudococcus longispinus) at the base; treat with systemic insecticide
Agave snout weevil (Scyphophorus acupunctatus): caudex borer, lethal if not detected early
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"The taxonomic position of Agave scabra vs. A. asperrima remains debated. POWO (Kew) accepts both as distinct species while Flora of North America synonymizes them. For garden collections the name scabra is retained following POWO 2024. Specimens from northern Coahuila and southern Texas show greater leaf roughness than those from southern populations, possibly reflecting clinal variation or a yet-unresolved species separation."
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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.