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Description
Gymnocarpium Jessoense Subsp. Parvulum, commonly known as the dwarf oak fern, is a small-sized fern species belonging to the family Woodsiaceae. It is native to Japan, especially in Hokkaido, Honshu, and Shikoku. It grows in moist, shady habitats, such as rocky slopes, forests, and stream banks. The fern has a short rhizome that produces several fronds, each with a length of 5-15 cm.
Taxonomic Information
| Domain | Eukaryota |
|---|---|
| Kingdom | Plantae |
| Phylum | Pteridophyta |
| Class | Polypodiopsida |
| Order | Polypodiales |
| Family | Woodsiaceae |
| Genus | Gymnocarpium |
| Species | Jessoense |
| Subspecies | Parvulum |
Appearance
The Gymnocarpium Jessoense Subsp. Parvulum fern has a lacy and delicate appearance. Its fronds are bi- or tri-pinnate, meaning that each leaf is divided into multiple leaflets, which are further divided into sub-leaflets. The leaflets are elongated and lance-shaped, with serrated edges. The fern’s color is bright green, and it has a matte texture. The rhizome and stipe, or stem, of the fern are hairy and reddish-brown.
Care Guide
Gymnocarpium Jessoense Subsp. Parvulum requires specific care to thrive. Here are some essential care tips for this fern:
Water: Keep the soil moist but not waterlogged. Water the fern regularly, especially during hot and dry weather.
Fertilization: Use a balanced, water-soluble fertilizer every two weeks during the growing season.
Soil: The fern prefers well-draining soil that is rich in organic matter, such as peat moss or compost. The soil should be slightly acidic, with a pH range of 5.0-7.0.
Sunlight: The fern thrives in partial to full shade. Avoid direct sunlight, which can damage the fronds.
Hardiness Zones: The fern is hardy in USDA zones 3-8, meaning it can withstand temperatures as low as -40°F.
Common Pests & Diseases
Gymnocarpium Jessoense Subsp. Parvulum is relatively disease and pest-resistant. However, it can be susceptible to fungal diseases, such as rust and leaf spot. To prevent these diseases, avoid overhead watering and ensure adequate air circulation around the fern. Common pests that may attack the fern include slugs, snails, and aphids. To control these pests, use organic insecticides or handpick them off the fern.
Habitat
Gymnocarpium Jessoense Subsp. Parvulum is native to Japan, where it grows in moist, shady habitats. It prefers rocky slopes, forests, and stream banks. The fern is adapted to cold temperatures, high humidity, and low light levels.
Question and Answer
Q: Can Gymnocarpium Jessoense Subsp. Parvulum grow in full sun?
A: No, the fern prefers partial to full shade and can get damaged by direct sunlight.
Q: How often should I water the fern?
A: The fern prefers moist soil. Water it regularly, especially during dry weather.
Q: What is the ideal temperature range for Gymnocarpium Jessoense Subsp. Parvulum?
A: The fern is hardy in USDA zones 3-8, meaning it can withstand temperatures as low as -40°F.
Q: What type of soil does the fern prefer?
A: Gymnocarpium Jessoense Subsp. Parvulum prefers well-draining soil that is rich in organic matter, such as peat moss or compost. The soil should be slightly acidic, with a pH range of 5.0-7.0.
Related Plants
Here are some related plants to Gymnocarpium Jessoense Subsp. Parvulum:
- Gymnocarpium dryopteris
- Gymnocarpium disjunctum
- Gymnocarpium robertianum
- Gymnocarpium appalachianum
References
- https://www.gbif.org/species/2683357
- https://www.inaturalist.org/taxa/145798-Gymnocarpium-jessoense-parvulum
- https://www.gardenia.net/plant/gymnocarpium-jessoense-subsp-parvulum
