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The Forest Service National Center for Reforestation, Nurseries, and Genetic Resources (RNGR) is a leading source of technical information for nurseries and land managers regarding production and planting of trees and other native plants for reforestation, restoration, and conservation.

 
NPN Protocol Details Image

Grindelia (squarrosa)

Carol and Jerry Baskin
Professors
University of Kentucky
University of Kentucky
Lexington, Kentucky 40506-0225
seedlings.uidaho.com

Family Scientific Name: Asteraceae
Family Common Name: Sunflower family
Scientific Name: Grindelia squarrosa (Pursh) Dun.
Common Name: Curly top gumweed
Species Code: GRISQU
General Distribution: G. squarrosa is a cordillrean and gret Plains species, that is sporadically introduced in the eastern United States.
Propagation Goal: plants
Propagation Method: seed
ProductType: Container (plug)
Time To Grow: 0
Propagule Processing: Seeds exhibit physiological dormancy.
Pre-Planting Treatments: Seeds are placed in cold moist stratification for 60 to 90 days.
Germination occurs at 22 C, 25D/20N C alternating temperature cycle.
Germination was greater in light than dark.
References: Smreciu, E. A., Currah, R. S. and Toop, E. (1988). Viability and germination of herbaceous perennial species native to southern Alberta grasslands. Can. Field-Nat. 102, 31-38.
McDonough, W. T. (1975). Germination polymorphism in Grindelia squarrosa (Pursh) Dunal. Northw. Sci. 49, 190-200.
Table 10.22 In: Baskin, C.J. and Baskin, J.M. Seeds: Ecology, Biogeography and Evolution in Dormancy and Germination, Academic Press, 1998. Chapter 10: A Geographical Perspective on Germination Ecology: Temperate and Arctic Zones, pages 331 to 458.

Citation:

Baskin, Jerry M.; Baskin, Carol C.. 2002. Propagation protocol for production of Container (plug) Grindelia squarrosa (Pursh) Dun. plants University of Kentucky Lexington, Kentucky. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2024/07/03). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.