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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

Cirsium (occidentale)

Jim Barner
Seed Extractory Manager
USDA FS - R6 Bend Seed Extractory
63095 Deschutes Market Rd.
Bend, Oregon 97701
541-383-5481
541-383-5498 (fax)
jbarner@fs.fed.us
http://fsweb-ochdes.r6.fs.fed.us/seedextractory/ex
Family Scientific Name: Asteraceae
Family Common Name: Aster family
Scientific Name: Cirsium occidentale (Nutt.) Jeps.
Common Name: Cobwebby thistle
Species Code: CIOC
Ecotype: USFS, Umpqua National Forest, Diamond Lake Ranger District, Medicine Creek, Oregon: 3500 ft. elevation
Propagation Goal: seeds
Propagation Method: seed
ProductType: Propagules (seeds, cuttings, poles, etc.)
Time To Grow: 0
Propagule Collection: Very small lot, 0.015 pounds, hand collected into paper bag.
Propagule Processing: METHOD OF CLEANING: Seed lot is first processed (rubbed) by hand, using gloves, to remove seed from flower heads. Seed is then air-screened, to remove nonviable seed and inert material, using an office Clipper, top screen: 10 round and a bottom screen: 1/12 or 1/15 round, medium speed, and medium to high air. Number of Seeds per Pound: 28,140, Purity: 99%, X-Ray 100 Seeds: 95% Filled, TZ: 96% (Oregon State University Seed Laboratory Analysis)
Harvesting, Storage and Shipping: Storage: Cold Storage, 33-38 Degrees Fahrenheit

Citation:

Barner, Jim. 2009. Propagation protocol for production of Propagules (seeds, cuttings, poles, etc.) Cirsium occidentale (Nutt.) Jeps. seeds USDA FS - R6 Bend Seed Extractory Bend, Oregon. 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.