sago palm

Names and Synonyms

Common Names

• sago palm
• True Sago Palm

Scientific Names

Accepted name

Synonyms

• Sagus longispina
• Sagus inermis
• Sagus micracantha
• Sagus sagu
• Sagus koenigii
• Sagus americana
• Metroxylon hermaphroditum
• Sagus genuina
• Metroxylon inerme
• Sagus genuina laevis
• Metroxylon laeve
• Sagus genuina longispina
• Metroxylon longispinum
• Sagus genuina sylvestris
• Metroxylon sagu f. longispinum
• Metroxylon sagu f. micracanthum
• Sagus rumphii
• Metroxylon sagu f. tuberatum
• Metroxylon squarrosum
• Sagus spinosa
• Metroxylon sylvestre
• Sagus sylvestris
• Metroxylon oxybracteatum
• Metroxylon micracanthum
• Metroxylon rumphii
• Sagus laevis

Regional and Traditional Names

Sources: Wikidata, Catalogue of Life

Taxonomical Classification

This plant belongs to the kingdom Plantae and is classified within the phylum Streptophyta and the class Equisetopsida. Further taxonomic placement identifies it under the subclass Magnoliidae and the order Arecales. It is a member of the family Arecaceae, specifically categorized under the genus Metroxylon.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant exhibits a broad geographical distribution across several key regions in Southeast Asia. Within the Indo-China region, its presence is specifically noted in Thailand. Moving into the Malesia zone, it can be found inhabiting the island of Borneo. The species also extends its range to the islands of Jawa and the Malay Peninsula. Furthermore, its distribution reaches as far as the Maluku archipelago.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Metroxylon sagu is defined by its strategic positioning within the forest structure, where it primarily occupies the canopy layer, competing for sunlight and space within high-density vegetation. This positioning allows it to access intense solar radiation necessary for its metabolic processes. To mitigate the pressures of herbivory and environmental stressors inherent to its niche, the plant employs active defense mechanisms, utilizing specialized biological or chemical strategies to ensure its survival and reproductive success within its complex ecosystem.

Defense :

yes

Habitat :

canopy

Life history

The life history of Metroxylon sagu is characterized by its status as a perennial species, ensuring its presence in its ecosystem over many growing seasons. As a phanerophyte, the plant maintains its photosynthetic organs on elevated structures, a life form that is consistently categorized under both phanerophyte classifications. Furthermore, it exhibits an evergreen deciduousness pattern, retaining its foliage throughout the year to sustain continuous physiological processes.

Deciduousness :

evergreen

Life form :

phanerophyte

Lifecycle :

perennial

Morphology

The morphology of Metroxylon sagu is characterized by its robust growth form as a woody tree, which functions as an independent organism without parasitic tendencies. It typically attains a significant plant height with an average of approximately 10 m, though individual specimens can exhibit a maximum shoot length of up to 2000 cm. The plant maintains an erect shoot orientation and is classified as a self-supporting structure rather than a climber. As a terrestrial species, it is not an epiphyte, growing directly in the soil. The structural integrity of the tree is supported by woody tissues, and it can develop a substantial diameter at breast height (DBH), reaching a maximum of 60 cm.

Climber :

self-supporting

DBH max:

60 cm

Epiphyte :

terrestrial

Growth form :

tree

Parasite :

independent

Plant height mean:

10 m

Shoot length max:

2000 cm

Shoot orientation :

erect

Woodiness :

woody

Physiology

The physiology of Metroxylon sagu is characterized by distinct morphological and biochemical adaptations, including a substantial leaf structure that can reach a maximum leaf length of 1025 cm. The foliage is structurally complex, possessing the presence of leaf spines, which serve as a physical defense mechanism. In terms of nutrient cycling and metabolic processes, the plant does not function as a nitrogen fixer, meaning it relies on the uptake of available nitrates and ammonium from the soil rather than through symbiotic nitrogen-fixing bacteria.

Leaf length max:

1025 cm

Leaf spines :

yes

Nitrogen fixer :

no

Reproduction

The reproduction of Metroxylon sagu is characterized by a specific pollination and fruiting mechanism where self-fertilization is notably absent, necessitating cross-pollination for successful progeny development. The resulting fruits exhibit significant morphological variation in size and shape. Specifically, the fruit length ranges from a minimum of 7 cm to a maximum of 13 cm, with an average length of approximately 10 cm. In terms of width, the fruits vary from a minimum of 8 cm to a maximum of 12 cm, maintaining a mean width of 10 cm. Throughout their developmental stages, these fruits are distinguished by a consistent green coloration.

Fruit colour :

green

Fruit length max:

13 cm

Fruit length mean:

10 cm

Fruit length min:

7 cm

Fruit width max:

12 cm

Fruit width mean:

10 cm

Fruit width min:

8 cm

Self fertilization :

absent

Sources: Global Inventory of Floras and Traits (GIFT)

Chemicals

Metroxylon sagu has 1 reported phytochemicals identified across 0 scientific publications and several other databases. The most consistently reported chemicals include Galactomannan.

Galactomannan

1. Journal of agricultural and food chemistry