Originating from Madagascar, Alluaudia procera, more commonly known as the Octopus Tree, is an astonishing and must-see plant in the Au Bois Vert botanical garden. Indeed, this species is part of the Didiereaceae, a unique botanical family found only on this fascinating island. With its recognisable silhouette, the Octopus Tree features upright stems covered with sharp spines, resembling tentacles. Additionally, these green and fleshy stems allow it to store water, an essential adaptation to its arid environment.
Furthermore, this remarkable plant thrives in the dry and thorny forests of southern Madagascar, where the harsh climate imposes particular growth conditions. Its ability to prosper in poor and rocky soils grants it great resilience. In fact, Alluaudia procera, or Octopus Tree, can reach up to 15 metres in height when mature. Additionally, its small, round leaves appear during the wet season before falling during the dry period to limit evaporation.
The Au Bois Vert botanical garden, located near Ivato, not far from Antananarivo, is an ideal place to discover this botanical marvel. Indeed, its unique appearance attracts not only rare plant enthusiasts but also visitors to the restaurant and lodge, in search of exploration and relaxation. Thus, the Octopus Tree perfectly illustrates the discreet beauty of plants adapted to extreme climates and testifies to the incredible Malagasy biodiversity.
Plant use
The Alluaudia procera, besides being a botanical curiosity, has several uses for the local populations of Madagascar. Its hard and dense wood is highly valued in construction, particularly for making durable fences. The thorny branches are used to create natural barriers to protect homes and crops from animal intrusions. Furthermore, certain parts of the plant play a role in traditional Malagasy medicine. The sap, when carefully harvested, is believed to have antiseptic properties and is used to treat minor ailments. The leaves, although small and seasonal, serve as an occasional food source for livestock during periods of drought when other food supplies become scarce. In a more contemporary setting, the Octopus Tree is gaining popularity in botanical gardens and as an ornamental plant. Its unique and sculptural silhouette makes it an excellent feature for dry gardens or greenhouses dedicated to xerophytic plants. Visitors to the Au Bois Vert botanical garden can admire this emblematic tree while enjoying the amenities offered by the nearby hotel and restaurant. This species highlights the richness of Malagasy flora and the importance of its preservation and promotion.
Key information
| Common name | Octopus Tree |
| Scientific name | Alluaudia procera |
| Origin | Madagascar |
| Natural habitat | Dry and thorny forests |
| Life cycle | Perennial |
| Flowering period | Rainy season (November-March) |
