Aloe imalotensis | selected form

Geographic & Climate

• Geographic Coordinates: Type locality recorded in southwestern Madagascar, along the Imaloto River valley near Mahaboboka and the Isalo Massif (approx. 22°30'S to 22°50'S, 44°30'E to 45°20'E).

• Climate Classification: Semi-arid tropical climate with a pronounced dry winter period (Köppen: BSh / Aw transition zone).

• Habitat Characteristics: Occurs on exposed quartz sandstones, dry rock crevices, and eroded sandstone plateaus at elevations ranging from 350 m to 900 m. Native substrate consists of nutrient-poor, highly porous silica sand and granite gravel, adapted to high summer radiation and extended droughts.

Botanical Morphology

• Diagnostic Features: Forms compact, acaulescent (stemless) rosettes (20–30 cm in diameter). Leaves are broad, ovate-lanceolate to triangular, wax-coated glaucous grey-green turning purplish-bronze when sun-stressed, marked with delicate longitudinal fine lines (lineate). Leaf margins feature thin, translucent, pinkish-to-red cartilaginous edges set with small, firm, sharp deltoid teeth (1–2 mm long). Inflorescences are 1 to 3-branched, bearing short, dense conical racemes of pale salmon-pink to coral flowers with pale whitish/greenish tips.

• Growth Habit: Slow-growing, solitary to moderately off-setting perennial succulent. Enters dormancy during extended dry spells. Reaches a final rosette diameter of 20–30 cm; flowering spikes extend to 40–60 cm tall.

History & Etymology

• Etymology: The specific epithet imalotensis derives from its type locality near the Imaloto River in southwestern Madagascar, appended with the Latin geographical suffix -ensis ("originating from").

• Historical Context: Formally described in 1957 by South African botanist Gilbert Westacott Reynolds (1895–1967) in the Journal of South African Botany. Reynolds collected specimens during his field expeditions across Madagascar, distinguishing this species from the closely related Aloe deltoideodonta complex by its finer marginal teeth, fine lineate foliage, and characteristic pale salmon-pink racemes.