RNGR.net is sponsored by the USDA Forest Service and Southern Regional Extension Forestry and is a colloborative effort between these two agencies.

U.S. Department of Agriculture USDA Forest Service Southern Regional Extension Forestry Southern Regional Extension Forestry

Skip to content. | Skip to navigation

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

Senecio (triangularis)

Mark E. Majerus
USDA NRCS - Bridger Plant Materials Center
99 South River Road, Rte. 2, Box 1189
Bridger, Montana 59014-9718
(406) 662-3579
(406) 662-3428 (fax)
mmajerus@mt.nrcs.usda.gov
http://plant-materials.nrcs.usda.gov/mtpmc
Family Scientific Name: Asteraceae
Family Common Name: Sunflower Family
Scientific Name: Senecio triangularis Hook.
Common Name: Arrowleaf groundsel
Species Code: SENTRI
Ecotype: Logan Pass area of Glacier National Park.
Propagation Goal: plants
Propagation Method: seed
ProductType: Propagules (seeds, cuttings, poles, etc.)
Stock Type: Propagation Goal: Develop technology for direct seeding of this species for high elevation habitat restoration.
Time To Grow: 0
Propagule Processing: Process seed heads in a hammermill with a #8 (0.125-inch diameter holes) screen. Clean processed materials over a fanning mill with fairly high wind to remove light seed and chaff.
Pre-Planting Treatments: Our only experience is with a 6-month cold moist chilling in a refrigerator maintained at 34 to 37øF. The seeds were sown on germination pads in petri dishes and kept moist for the duration of the cold chill. The stratified seeds were subsequently exposed to 3 irradiance levels (full, partial, zero) in an environmental growth chamber maintained at 86øF days for an 8-hour daylight photoperiod and 68øF nights for 16 hours. Each treatment consisted of 5 reps of 25 seed/rep. This species was very responsive to decreasing light intensity with mean germination decreasing from 62.4% under full irradiance (mean 268 footcandles) to 15.2% and 20% for partial (mean 23 foot candles) and zero irradiance, respectively. There were also slight increases in seedling mortality from full irradiance (no mortality) to partial (5.26%) and zero irradiance (8%). No appreciable gains in germination occurred after exposing the partial and zero irradiance groups to a secondary full irradiance.
Other Comments: Study results indicate that a 6-month cold moist chilling is adequate to break dormancy, although the optimum amount of cold chilling was not determined. Germination is effected negatively by reduced irradiance. During propagation from seeds provide adequate intensities of light. Increase seeding rates to meet target cover or species composition when using mulch or agronomy cloth.

Citation:

Scianna, Joe. 2003. Propagation protocol for production of Propagules (seeds, cuttings, poles, etc.) Senecio triangularis Hook. plants Propagation Goal: Develop technology for direct seeding of this species for high elevation habitat restoration.; USDA NRCS - Bridger Plant Materials Center Bridger, Montana. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2025/02/23). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.