Aloe inermis Forssk.
Spineless Aloe
Aloe inermis is an unusual species in the genus due to the near-total absence of teeth on its leaf margins, which gives it its name (inermis = unarmed). Native to the Horn of Africa — particularly Yemen, Ethiopia and Somalia — it grows on arid stony slopes between 500 and 1500 m altitude. Its leaves are long, glaucous and slightly recurved, with tubular yellow-orange flowers. It is an endangered species due to overexploitation of its natural habitat.
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Overview
| Category | Classification |
|---|---|
| Family | Asphodelaceae |
| Genus | Aloe |
| Growth Habit | Solitary or sparsely branched rosette |
| Conservation Status | Endangered (IUCN EN) |
| pH Target | 6.5–8.0 |
| Type | Very well-draining mineral substrate with low organic content |
Origin & Habitat
Morphology
Lance-shaped, up to 50 cm long, glaucous green to grey-green in colour. Margins practically smooth, toothless or with very vestigial whitish cartilaginous teeth.
ecoCan develop a short, robust trunk with age, with dried leaf remnants attached. In young plants the stem is practically invisible.
ecoTubular, 2–3 cm, yellow-orange to orange, arranged in loose cylindrical racemes on 50–80 cm peduncles. Blooms in summer.
ecoRobust roots, semi-woody at the base, with fine absorbing rootlets. Adapted to very thin, stony soils.
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Requirements
Soil & Substrate
Type
Very well-draining mineral substrate with low organic content
groups Beneficial Associations
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Propagation Strategy
- 1 Sow in sterile sandy substrate at 25–28 °C under bright indirect light.
- 2 Keep slightly moist until seedlings emerge.
- 3 Transplant individually when seedlings are 4–5 cm tall.
Difficult to cultivate outside its native arid conditions; avoid high ambient humidity.
Overwatering causing rapid crown rot in high-humidity conditions.
Every 4–5 years; poorly tolerates root disturbance
Once a year in spring with a low-nitrogen fertilizer
Uses & Applications
Precautions / Toxicity
Mildly toxic; sap may irritate sensitive skin
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"A threatened species whose ex situ reproduction in botanical collections is a priority. The scarcity of marginal teeth distinguishes it easily from most African aloes."
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Scientific Integrity
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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.