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1.Autumn Fern — Overview
Dryopteris erythrosora, commonly known as the Autumn Fern or Japanese Shield Fern, is a distinctive and highly prized ornamental fern native to the temperate regions of East Asia, including Japan, China, and Korea. This terrestrial, semi-evergreen to evergreen perennial belongs to the Dryopteridaceae family, a diverse group recognized for their robust nature and often referred to as wood or shield ferns.
The species epithet 'erythrosora' aptly describes its unique feature: 'red sori,' referring to the reddish protective coverings (indusia) that house the spores on the underside of its fronds.
The most captivating aspect of Dryopteris erythrosora is its dynamic frond coloration. New fronds unfurl in striking coppery-red, bronze, or orange hues, creating a vibrant autumnal display even in spring.
As they mature, these lacy, bipinnate to tripinnate fronds transition to a glossy dark green, providing continuous visual interest. Growing in an elegant, vase-shaped clump, the Autumn Fern typically reaches heights of 18 to 30 inches (45-75 cm) with a similar spread, slowly expanding via creeping rhizomes.
Unlike many delicate fern species, Dryopteris erythrosora exhibits remarkable resilience, tolerating a wider range of conditions, including some dry spells and heavier clay soils once established. It thrives in dappled sun to deep shade, making it an excellent choice for shaded gardens, woodland settings, and as a container plant.
Ecologically, it contributes to forest understory ecosystems by providing ground cover, enhancing biodiversity, and aiding in soil stabilization. While primarily valued for its aesthetic appeal, various Dryopteris species have been historically utilized in traditional East Asian medicine for their anthelmintic and anti-inflammatory properties.
Trusted Scientific References
Authoritative external sources for Dryopteris erythrosora:
1.1.Autumn Fern — Key Features
- Distinctive Coppery — Red New Fronds
- Semi — Evergreen to Evergreen Foliage
- Thrives in Shade — Thrives in Shade and Woodland Environments
- High Tolerance to — High Tolerance to Deer and Rabbits
- Low Maintenance and — Low Maintenance and Resilient Plant
- Native to East — Native to East Asia (Japan, China, Korea)
- Unique Red Sori — Unique Red Sori (spore clusters) on Frond Undersides
- Spreads Slowly via — Spreads Slowly via Creeping Rhizomes
- Adapts to Various — Adapts to Various Soil Types Once Established
- Traditional Medicinal History — Traditional Medicinal History for Anthelmintic Use
1.2.Autumn Fern — Quick Summary
- Autumn Fern (Dryopteris erythrosora) is a beautiful, semi-evergreen ornamental fern.
- Features striking coppery-red new fronds that mature to glossy green.
- Traditionally used in East Asian medicine for anthelmintic and anti-inflammatory properties.
- Contains potent compounds like phloroglucinols, flavonoids, and tannins.
- Thrives in shade, low maintenance, and resistant to deer and rabbits.
- Internal medicinal use is highly toxic and strongly discouraged without expert medical supervision.
2.Autumn Fern — Scientific Identity
3.Autumn Fern — Categories & Tags
4.Autumn Fern — Appearance & Identification
5.Autumn Fern — Water Requirements
- Site Selection — Choose a location with dappled sun to deep shade; avoid harsh, direct afternoon sun which can scorch fronds.
- Soil Requirements — Prefers acidic (pH 5.5-6.5), consistently moist, well-draining soil rich in organic matter. Amend heavy soils with compost.
- Watering — Keep soil evenly moist, especially during dry periods. Established plants can tolerate brief droughts but perform best with regular moisture.
- Protection — Shield from strong, drying winds which can dehydrate fronds. Mulch can help retain soil moisture and regulate temperature.
- Propagation — Primarily propagated by spores, but established clumps can be divided in spring as new growth emerges, ensuring each division has rhizome and fronds.
- Maintenance — Low maintenance; remove old or damaged fronds as needed. Generally resistant to deer and rabbits.
- Container Growing — Excellent choice for containers on shaded patios or indoors, provided consistent moisture and appropriate soil conditions.
Reviewed by the Flora Medical Global Botanical Review Panel
Multi-disciplinary editorial group · Botany · Ethnobotany · Herbal-medicine literature
Who reviewed this: This page was checked by the Flora Medical Global Botanical Review Panel — an in-house editorial group of botany graduates, ethnobotany researchers, and horticulture practitioners who collectively maintain our 7,000+ plant encyclopedia. Meet the team.
Our 4-step verification process
1. Taxonomic verification
Scientific names and synonyms cross-checked against Kew POWO, World Flora Online, and The Plant List.
2. Phytochemical & medicinal cross-reference
Active compounds, traditional uses, and reported activities are cross-referenced with PubMed, USDA Dr. Duke's database, and peer-reviewed ethnobotanical literature.
3. Conservation & distribution check
Distribution, ecology, and conservation status confirmed against GBIF occurrence records and the IUCN Red List.
4. Editorial & safety review
Every entry passes an editorial pass for clarity, originality, and safety notices (toxicity, contraindications, dosage caveats) before publication.
Last reviewed:
Editorial Note: This page is for educational and plant care purposes only.
Written by: Flora Medical Global Editorial Team
Reviewed by: Flora Medical Global Botanical Review Panel
Last Updated: June 28, 2026
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