Taraxacum (lyratum)

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
Family Common Name:	Sunflower family
Scientific Name:	Taraxacum lyratum (Ledeb.) DC.
Common Name:	Dwarf alpine dandelion
Species Code:	TARLYR
Ecotype:	Alpine slope, Many Glacier, Glacier National Park, MT.
General Distribution:	T. lyratum occurs in rocky places at high elevations in arctic America and northeast Asia, extending south at alpine levels to Nevada, Arizona, and Colorado.
Propagation Goal:	plants
Propagation Method:	seed
ProductType:	Container (plug)
Stock Type:	160 ml conetainers
Time To Grow:	1 Years
Target Specifications:	Height: 3 cm, 6 to 8 true leaves<br> Caliper: n/a<br> Root System: firm plug in 116 ml conetainer.
Propagule Collection:	Seeds are hand collected in late August when achenes turn gray and are easily removed from the disc. Seeds are dark grey at maturity. Seeds are collected in paper envelopes and kept in a well ventilated drying shed prior to cleaning.
Propagule Processing:	Seeds are hand cleaned. Seed longevity is estimated at 5 to 7 years. Seed dormancy is classified as non-deep physiological dormancy. Seeds/Kg: 1,240,000 /kg % Purity: 100% % Germination: 4 to 50%
Pre-Planting Treatments:	5 month outdoor cold, moist stratification.
Growing Area Preparation/ Annual Practices for Perennial Crops:	Outdoor nursery growing facility. Sowing Method: Direct Seeding. Seeds are lightly covered with medium. Growing medium used is 50% milled spaghnum peat, perlite, and vermiculite with Osmocote controlled release fertilizer (13N:13P2O5:13K2O; 8 to 9 month release rate at 21C) and Micromax fertilizer (12%S, 0.1%B, 0.5%Cu, 12%Fe, 2.5%Mn, 0.05%Mo, 1%Zn) at the rate of 1 gram of Osmocote and 0.20 gram of Micromax per conetainer. Conetainers are filled and sown in late fall and irrigated thoroughly prior to winter stratification.
Establishment Phase:	Media is kept slightly moist during germination.
Length of Establishment Phase:	4 weeks
Active Growth Phase:	Root and shoot development occurs rapidly following germination. Plants were fertilized with 20-10-20 liquid NPK fertilizer at 100 ppm as needed during the growing season. Plants were fully root tight 4 months after germination. Plants flower the following year.
Length of Active Growth Phase:	16 weeks
Hardening Phase:	Irrigation is gradually reduced in September and October. Plants are leached with clear water and fertilized with 10-20-20 liquid NPK fertilizer at 200 ppm once before winterization.
Length of Hardening Phase:	4 weeks
Harvesting, Storage and Shipping:	Total time To Harvest: 1 year Harvest Date: August Storage Conditions: Overwinter in outdoor nursery under insulating foam cover and snow.
Length of Storage:	5 months
References:	Flora of the Pacific Northwest, Hitchcock and Cronquist, 7th edition, University of Washington Press, 1973. Seeding Rate Statistics for Native and Introduced Species, Hassell, Wendel, U.S.D.I. and U.S.D.A., April 1996. Seeds: Ecology, Biogeography, and Evolution of Dormancy and Germination, Baskin and Baskin, Academic Press, 1998. Seed Germination Theory and Practice, Deno, Norman, Penn State University, 1993. Glacier National Park Native Plant Nursery Propagation Records, unpublished.

Citation:

Luna, Tara; Evans, Jeff; Wick, Dale. 2008. Propagation protocol for production of Container (plug) Taraxacum lyratum (Ledeb.) DC. plants 160 ml conetainers; USDI NPS - Glacier National Park West Glacier, Montana. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2024/04/25). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.