Asian royal fern

Names and Synonyms

Scientific Names

Accepted name

Synonyms

• Osmunda japonica var. sublancea
• Osmunda regalis f. divisa
• Osmunda japonica f. divisa
• Osmunda japonica var. divisa
• Osmunda biformis
• Osmunda biformis var. divisa
• Osmunda regalis var. japonica
• Osmunda regalis subsp. japonica
• Osmundastrum japonicum
• Osmunda regalis var. sublancea
• Osmunda biformis f. divisa
• Osmunda regalis var. biformis

Sources: Wikidata, Catalogue of Life

Taxonomical Classification

This plant belongs to the kingdom Plantae and is classified under the phylum Streptophyta within the class Equisetopsida. It falls under the subclass Polypodiinae and the order Osmundales, specifically within the family Osmundaceae. Finally, its scientific designation is placed within the genus Osmunda.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant exhibits a broad distribution across several distinct regions in East Asia. In the Russian Far East, its range extends to the Kuril Islands and Sakhalin. Within China, it is widely spread across the North-Central territories. Furthermore, the species can be found throughout the South-Central regions of the country. Finally, its presence is also established in the Southeast portions of China.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Life history

The life history of Osmunda japonica is characterized by its specialized survival strategies, specifically categorized by its life forms as a geophyte and a cryptophyte. As a geophyte, the plant relies on underground storage organs, such as rhizomes, to endure unfavorable environmental conditions and facilitate regrowth during favorable seasons. This subterranean existence allows it to persist through periods of dormancy, ensuring its long-term survival in its natural habitat. Simultaneously, its classification as a cryptophyte highlights its reliance on these protected, non-aerial structures to protect its vital meristematic tissues from external stresses like frost or drought. This combination of traits enables a perennial life cycle where the plant can emerge seasonally from its underground reservoirs to produce lush, fertile fronds, navigating its ecological niche through a robust cycle of underground persistence and aerial expansion.

Life form :

geophyte

Life form :

cryptophyte

Morphology

The morphology of Osmunda japonica is characterized by its growth habit and structural composition, functioning primarily as a terrestrial plant rather than an epiphyte, following an obligatory terrestrial life cycle. The plant exhibits a non-woody structural nature, lacking true woody tissues and instead relying on fleshy, herbaceous stems and fronds. Its vegetative architecture typically consists of erect, starchy rhizomes that give rise to large, bipinnate to tripinnate fronds, which are organized in a spreading pattern to maximize light interception in its natural habitat.

Epiphyte :

terrestrial

Woodiness :

non-woody

Sources: Global Inventory of Floras and Traits (GIFT)

Plant Parts

Osmunda japonica has 1 reported plant parts identified across 1 scientific publications and several other databases that are studied for medicinal purposes. The most consistently reported plant part include rhizome.

Rhizome

1. Chinese journal of integrative medicine

Chemicals

Osmunda japonica has 3 reported phytochemicals identified across 1 scientific publications and several other databases. The most consistently reported chemicals include 4-Hydroxybenzalacetone, 4-hydroxybenzaldehyde, Dryocrassin.

4-Hydroxybenzalacetone

1. Chinese journal of integrative medicine

4-hydroxybenzaldehyde

1. Chinese journal of integrative medicine

Dryocrassin

1. Chinese medicine

Conditions

Osmunda japonica has 1 reported investigations on conditions identified across 1 scientific publications and several other databases. The most consistently reported conditions include HSV-2.

Hsv-2

1. Archives of pharmacal research