Carex (deweyana)

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:	Cyperaceae
Family Common Name:	Sedge Family
Scientific Name:	Carex deweyana Schwein.
Common Name:	Dewey's sedge
Species Code:	CARDEW
Ecotype:	Cedar/Hemlock forest margin, Avalanche, Glacier National Park, Flathead Co., MT., 1100m elevation.
General Distribution:	C. deweyana grows in moist forest openings and streambanks, from near sea level to near tree line, widespread throughout North America and eastern Asia.
Propagation Goal:	plants
Propagation Method:	seed
ProductType:	Container (plug)
Stock Type:	160 ml conetainers
Time To Grow:	11 Months
Target Specifications:	Stock Type: Container seedling<br> Height: 6 to 10 true leaves; 15 cm.<br> Caliper: n/a<br> Root System: firm plug in conetainer.
Propagule Collection:	Seeds are collected in late August when perigynia turn tan and are easily stripped from the inflorescence. Seeds ares collected in paper bags and stored in drying shed prior to cleaning.
Propagule Processing:	Seeds are hand rubbed and screened. Seed longevity is unknown. Seed dormancy is classified as non deep physiological dormancy. Seeds/Kg: 220,000 /kg % Purity: 100% % Germination: 40%
Pre-Planting Treatments:	5 month outdoor cold, moist stratification. Seeds are surface sown for the light requirement. Aminimum of 30 day cold, moist stratification and germination under fluctuating temperatures is recommended for this species.
Growing Area Preparation/ Annual Practices for Perennial Crops:	Outdoor nursery growing facility. Sowing Method: Direct Seeding. Seeds are surface sown. Growing medium used is 6:1:1 milled sphagnum 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 172 ml conetainer. Conetainers are filled and sown in late fall and irrigated thoroughly prior to winter stratification. Seedlings are irrigated with Rainbird automatic irrigation system in early morning until containers are thoroughly leached. Average growing season of nursery is from late April after snowmelt until October 15th.
Establishment Phase:	Medium is kept slightly moist during germination. Initial germination appeared uniform and occurred following 2 weeks of temperatures at 22C or above. 2 to 4 true leaves were evident 3 weeks after germination.
Length of Establishment Phase:	4 weeks
Active Growth Phase:	Root and shoot development occurs rapidly following germination.ÿ Plants were occasionally fertilized with 20-20-20 liquid NPK at 100 ppm during the growing season. Plants were fully root tight 10 weeks after germination.
Length of Active Growth Phase:	10 weeks
Hardening Phase:	Plants are fertilized with 10-20-20 liquid NPK at 200 ppm during August and September. Irrigation is gradually reduced in September and October. Plants were given one final irrigation prior to winterization.
Length of Hardening Phase:	8 weeks
Harvesting, Storage and Shipping:	Total Time to Harvest: 11 months Harvest Date: September Storage Conditions: Overwinter in outdoor nursery under insulating foam cover and snow.
Length of Storage:	5 months
Other Comments:	Vegetative Propagation Method: Divisions of mature nursery stock could be done.
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) Carex deweyana Schwein. plants 160 ml conetainers; USDI NPS - Glacier National Park West Glacier, Montana. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2024/12/11). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.