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Caltha (leptosepala)

Amy Bartow
Seed and Plant Production Manager
USDA NRCS - Corvallis Plant Materials Center
3415 NE Granger Ave
Corvallis, Oregon 97330
(541) 757-4812 ext 103
(541) 757-4733 (fax)
amy.bartow@or.usda.gov
http://plant-materials.nrcs.usda.gov/orpmc
Family Scientific Name: Ranunculaceae
Family Common Name: buttercup
Scientific Name: Caltha leptosepala
Common Synonym: Psychrophila leptosepala
Common Name: White Marsh Marigold
Species Code: CALE4
Ecotype: High elevation ecotype at Lassen National Park, Ca
General Distribution: This plant may be found in the Western US and Canada in sub-alpine and wetland or meadow areas.
Propagation Goal: plants
Propagation Method: seed
ProductType: Container (plug)
Stock Type: stubby containers
Time To Grow: Weeks
Target Specifications: Well-developed crowns, roots and rhizomes fill soil profile in container.
Pre-Planting Treatments: Our tests concluded that Caltha leptosepala seeds need a warm-cold-warm cycle in order to germinate. When placed in a warm (70F days 50F nights)greenhouse, there was no germination. Seeds did not germination following a cold-moist stratification period of 90 days. However, when the seeds were left in the warm for three months, placed in the cool for three months and then placed back into the warm growth chamber we saw a germination rate of 78%.

Citation:

Bartow, Amy; Cameron, Jordan. 2014. Propagation protocol for production of Container (plug) Caltha leptosepala plants stubby containers; USDA NRCS - Corvallis Plant Materials Center Corvallis, Oregon. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2025/04/18). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.