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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

Penstemon (gracilentus)

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: Scrophulariaceae
Family Common Name: figwort
Scientific Name: Penstemon gracilentus
Common Name: Slender penstemon
Species Code: PEGR4
Ecotype: High elevation ecotype at Lassen National Park, Ca
General Distribution: Slender beardtongue can be found mostly in Nevada, Oregon and California. It is seen primarily seen in the mountainous and sagebrush plateau areas where it grows best.
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 filling soil profile in container.
Pre-Planting Treatments: In our testing, 90 days of cold/moist treatment prior to placement in a warm growth chamber increased germination three times over. When placed directly into the chamber (held at 70 degree F during the day and 50 degrees at night) there was a germination rate of 11%. In contrast, when the seeds were first stratified in a cooler at a constant 38 degrees F beforehand this percentage increased to a germination at 33%.

Citation:

2014. Propagation protocol for production of Container (plug) Penstemon gracilentus plants stubby containers; USDA NRCS - Corvallis Plant Materials Center Corvallis, Oregon. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2024/07/02). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.