Draba (oligosperma)

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:	Brassicaceae
Family Common Name:	Mustard family
Scientific Name:	Draba oligosperma Hook.
Common Synonym:	Draba andina
Common Name:	Few seeded draba
Species Code:	DRAOLI
Ecotype:	Alpine fellfield, scree slope, Scenic Point, Two Medicine, Glacier National Park, Glacier Co., MT. 2500m elevation.
General Distribution:	D. oligosperma is a widespread species in much of western Canada and the United States; occurring from the plains to the alpine zone on well drained soils.
Propagation Goal:	plants
Propagation Method:	seed
ProductType:	Container (plug)
Stock Type:	160 ml conetainers
Time To Grow:	9 Months
Target Specifications:	Height: multiple leaves in a tight rosette, 3 cm<br> Caliper: n/a<br> Root System: firm plug in 160 ml conetainer
Propagule Collection:	Hand collect mature silicles in late August when they begin to split and turn tan in color. Seeds are brown at maturity. Seeds are stored in paper bags in a well ventilated drying shed prior to cleaning.
Propagule Processing:	Seeds are hand cleaned at the nursery by screening. Seed longevity is unknown. Seed dormancy is classified as physiological dormancy. Seeds/Kg: unknown % Purity: 100% % Germination:50%
Pre-Planting Treatments:	6 month outdoor, cold, moist stratification. Dry storage of fresh seed for 6 months prior to stratification is recommended for higher germination percentages for many species in this genus.
Growing Area Preparation/ Annual Practices for Perennial Crops:	Outdoor nursery growing facility. Sowing Method: Direct Seeding. Seed is covered with medium. Growing medium used is 6:1:1 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 .8 gram of Osmocote and 0.18 gram of Micromax per 160 ml conetainer. Conetainers are filled and sown in late fall and irrigated thoroughly prior to winter stratification.
Establishment Phase:	Medium is kept slightly moist during germination. Germination is complete in 2 weeks in the outdoor nursery during May under fluctuating temperatures.
Length of Establishment Phase:	4 weeks
Active Growth Phase:	Root development occurs rapidly following germination. 4 to 6 true leaves were evident in a tight rosette 6 weeks after germination. Plants quickly fill containers and were potted into a well aerated mix of 50% 6:1:1 milled spaghnum peat, perlite, and vermiculite and 50% sand with 1.5 grams of lime in 490 ml inch pots. Plants were fertilized with 13-13-13- liquid NPK at 100 ppm during the growing season.
Length of Active Growth Phase:	8 weeks
Hardening Phase:	Irrigation is gradually reduced in September and October. Plants are fertilized with 10-20-20 liquid NPK at 200 ppm fertilizer. Plants are then leached with clear water before winterization.
Length of Hardening Phase:	2 to 4 weeks
Harvesting, Storage and Shipping:	Total Time To Harvest: 9 months Harvest Date: late September Storage Conditions: Overwinter in outdoor nursery under insulating foam cover and snow.
Length of Storage:	5 months
Other Comments:	This species produces a well-branched taproot and a tight crown of several ramets. Divisions of ramets from established nursery stock should be tried. Plants flowered 1 year after germination. There are 2 botanical varieties; var. pectinipila, and var. oligosperma.
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) Draba oligosperma Hook. plants 160 ml conetainers; USDI NPS - Glacier National Park West Glacier, Montana. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2025/04/25). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.