Molucca raspberry

Names and Synonyms

Common Names

• Molucca raspberry
• Palmleaf dewberry

Scientific Names

Accepted name

Synonyms

• Rubus abortivus
• Rubus moluccanus var. sieboldii
• Rubus moluccanus var. subramiflorus
• Rubus moluccanus var. abortivus
• Rubus moluccanus var. bracteosus
• Rubus subramiflorus

Sources: Wikidata, Catalogue of Life

Taxonomical Classification

This plant belongs to the kingdom Plantae within the phylum Streptophyta and is classified under the class Equisetopsida and subclass Magnoliidae. As a member of the order Rosales and the family Rosaceae, it is further categorized under the genus Rubus.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant is primarily distributed throughout the regions of Eastern Asia. Within this part of the world, it can be found growing in Japan. Its range also extends to the Nansei-shoto islands located in the southern reaches of the archipelago. Additionally, the species has established a presence in the North-Central Pacific. Specifically, this geographical reach includes the islands of Hawaii.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Life history

The life history of Rubus sieboldii is characterized by its status as a perennial species, allowing it to persist in its habitat through multiple growing seasons. As a long-lived plant, it establishes a robust presence in its ecosystem, typically regenerating via rhizomes or through the dispersal of seeds produced after flowering. Its lifecycle involves a seasonal pattern of vegetative growth, the development of reproductive structures, and a period of dormancy during colder months. This perennial nature enables the plant to build energy reserves over several years, facilitating consistent flowering and fruit production, which supports its ongoing survival and ability to colonize surrounding areas.

Lifecycle :

perennial

Morphology

The morphology of Rubus sieboldii is characterized by its distinct growth form and structural complexity. This species functions as a woody subshrub, exhibiting a growth habit that transitions between a shrub and a subshrub depending on the maturity of the stems. Its structural development is notably woody, providing the necessary rigidity for its habit. While it possesses a sprawling nature, it is categorized as a self-supporting climber, meaning it maintains its upright or arching structure through its own woody development rather than relying on external support through specialized climbing organs.

Climber :

self-supporting

Growth form :

shrub

Growth form :

subshrub

Woodiness :

woody

Reproduction

Reproduction in Rubus sieboldii is characterized by the development of fleshy fruits that serve as the primary vehicle for seed dispersal. These fruits are described as having a fleshy consistency, which typically facilitates ingestion by various fauna to aid in the distribution of offspring. Within these fruits, the seeds are remarkably uniform in size; they possess a consistent seed volume with a minimum, maximum, and mean value of exactly 1.7 mm³. This precise measurement of 1.7 mm³ for the seed volume indicates a high level of morphological stability in the reproductive units of the plant.

Fruit dryness :

fleshy

Seed volume max:

1.7 mm³

Sources: Global Inventory of Floras and Traits (GIFT)

Chemicals

Rubus sieboldii has 3 reported phytochemicals identified across 0 scientific publications and several other databases. The most consistently reported chemicals include Euscaphic acid, Tormentic acid, triterpenoids.

Euscaphic acid

1. Biochimica et biophysica acta

Tormentic acid

1. Biochimica et biophysica acta

triterpenoids

1. Biochimica et biophysica acta