Arnica (mollis)
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Tara Luna USDI NPS - Glacier National Park West Glacier, Montana 59936 (406) 888-7835 http://plant-materials.nrcs.usda.gov/azpmc |
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| Family Scientific Name: | Asteraceae | ||
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| Family Common Name: | Sunflower Family | ||
| Scientific Name: | Arnica mollis Hook. | ||
| Common Synonym: | Arnica mollis Hook. silvatica | ||
| Common Name: | Hairy Arnica | ||
| Species Code: | ARNMOL | ||
| Ecotype: | Logan Pass, Glacier National Park, MT. | ||
| General Distribution: | A. mollis is found in moist soil of meadows, open forest, and along streams and is most common in the subalpine zone. it ranges from Alaska to California and south through the Rocky Mountain states to Colorado. | ||
| Propagation Goal: | plants | ||
| Propagation Method: | seed | ||
| ProductType: | Container (plug) | ||
| Stock Type: | 116 ml conetainers | ||
| Time To Grow: | 6 Months | ||
| Target Specifications: | Stock Type: Container seedling<br> Height: Multiple leaves<br> Caliper: N/A<br> Root System: Firm plug in conetainers. | ||
| Propagule Collection: | Seeds are collected in early September at high elevations when the pappus turns tan and is fully extended. Seeds are grey at maturity. Seeds are hand collected in paper bags and kept in a drying shed prior to cleaning. | ||
| Propagule Processing: |
Seeds are cleaned using a hammermill at NRCS> Seeds/kg: 990,000/kg Seed dormancy is classified as physiological dormancy. Seed Longevity: 5 to 7 years in sealed containers at 3C. % Germination: 82% |
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| Pre-Planting Treatments: |
Seeds are placed into a 60 day cold moist stratification in the refrigerator at 3C. Seeds are moistened with distilled water and wrapped in paper towels and placed in a open plastic bag. Check seeds weekly for moisture. |
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| Growing Area Preparation/ Annual Practices for Perennial Crops: |
Greenhouse. Sowing Method: Direct Seeding. Seeds are lightly covered with perlite. Plants are sown in early March in the greenhouse and later moved to the outdoor nursery in lateMay. Container Type and Volume: Seedlings are grown in 160 ml conetainers. Growing Media used is 6:1:1 milled sphagnum peat:perlite:vermiculite. |
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| Establishment Phase: |
Cotyledons emerge 10 days after sowing. True leaves emerge 14 days after sowing. |
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| Length of Establishment Phase: | 4 weeks | ||
| Active Growth Phase: | Once, established, seedlings develop rapid shoot and root growth. Seedlings are fertilized with 20-10-20 liquid NPK fertilizer at 100 ppm weekly during the active growth phase. | ||
| Length of Active Growth Phase: | 8 weeks | ||
| Hardening Phase: | Seedlings are fertilized with 10-20-20 liquid NPK fertilizer 2 to 4 weeks before outplanting.<br> | ||
| Length of Hardening Phase: | 4 weeks | ||
| Harvesting, Storage and Shipping: | Seedlings were outplanted the first year in July and August. | ||
| References: |
Seeds: Biogeography, Ecology and Evolution of Dormancy and Germination, Baskin and Baskin, Academic Press, 1998. Flora of the Pacific Northwest, Hitchcock and Cronquist, University of Washington Press, 1987. Glacier National Park Propagation Records, unpublished. |
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Citation:
Luna, Tara; Hosokawa, Joy. 2004. Propagation protocol for production of Container (plug) Arnica mollis Hook. plants 116 ml conetainers; USDI NPS - Glacier National Park West Glacier, Montana. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2024/12/30). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.
