Senecio (triangularis)

Tara Luna USDI NPS - Glacier National Park West Glacier, Montana 59936 (406) 888-7835 http://plant-materials.nrcs.usda.gov/azpmc

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Family Scientific Name:	Asteraceae
Family Common Name:	Sunflower Family
Scientific Name:	Senecio triangularis Hook.
Common Synonym:	Senecio triangularis Hook. angustifolius
Common Name:	Arrowleaf groundsel
Species Code:	SENTRI
Ecotype:	Subalpine meadows, Logan Pass,2032m elevation, Glacier National park, Glacier Co., MT.
General Distribution:	S. triangularis is a widespread cordilleran species; often at low elevations west of the Cascade Mountains but restricted to mid to high elevations east of the Cascade mountains. It is found from Alaska to Saskatchewen south to California and New Mexico. Itinhabits mountain and subalpine meadows and streambanks.
Propagation Goal:	plants
Propagation Method:	seed
ProductType:	Container (plug)
Stock Type:	160 ml conetainers
Time To Grow:	8 Months
Target Specifications:	Height: 7 cm, 4 to 8 true leaves<br> Caliper: n/a<br> Root System: Firm plug in 160 ml conetainer.
Propagule Collection:	Seeds are hand collected in mid September when achenes easily separate from the receptacle. Seeds are light tan at maturity. Seeds are kept in a well ventilated drying shed prior to cleaning.
Propagule Processing:	Seeds are cleaned using a hammermill and screens. Seed longevity is estimated up to 5 years at 3 to 5 C in sealed containers. Seed dormancy is classified as physiological dormancy. Seeds/Kg: 1,000,000/kg % Purity: 100% % Germination: 70 to 90%
Pre-Planting Treatments:	5 month outdoor cold, moist stratification.
Growing Area Preparation/ Annual Practices for Perennial Crops:	Outdoor nursery growing facility. Sowing Method: Direct Seeding. Seeds are surface sown for the light requirement. Growing medium used is 6:1:1 milled spaghnum peat, perlite, and vermiculite with Osmocote controlled release fertilizer (13N:13P2O5:13K2O; 8 to 9 month release rate at 21C) and Micromax fertilizer (12%S, 0.1%B, 0.5%Cu, 12%Fe, 2.5%Mn, 0.05%Mo, 1%Zn) at the rate of 1 gram of Osmocote and 0.20 gram of Micromax per conetainer. Conetainers are filled and sown in late fall and irrigated thoroughly prior to winter stratification.
Establishment Phase:	Germination occurs in early spring under fluctuating temperatures. Seeds germinate very uniformly. High germination rates were obtained on seeds that was surface sown vs. no germination on seeds that were covered with medium. Seedlings produced true leaves 3 weeks following germination and are thinned at this stage.
Length of Establishment Phase:	4 weeks
Active Growth Phase:	Once seedlings are established, plants develop rapid shoot and root growth 2 to 4 weeks following germination. Plants have 2 to 4 true leaves by week 3. Plants are fertilized with 20-10-20 liquid NPK fertilizer at 100 ppm weekly during the growing season.
Length of Active Growth Phase:	8 to 10 weeks
Hardening Phase:	Plants are fertilized with 10-20-20 liquid NPK fertilizer at 200 ppm in prior to outplanting or in early fall. Irrigation is gradually reduced through September and October.
Length of Hardening Phase:	2 to 4 weeks
Harvesting, Storage and Shipping:	Total Time To Harvest: 8 months Harvest Date: August Storage Conditions: Overwinter in outdoor nursery under insulating foam cover and snow.
Length of Storage:	5 months
References:	Flora of the Pacific Northwest, Hitchcock and Cronquist, Univ. of Washington Press, 7th printing, 1990. Seed Germination Theory and Practice, Second Edition, Deno, Norman, published 1993. Glacier Park Native Plant Nursery Propagation Records, unpublished.

Citation:

Luna, Tara; Corey, Susan; Wick, Dale. 2008. Propagation protocol for production of Container (plug) Senecio triangularis Hook. plants 160 ml conetainers; USDI NPS - Glacier National Park West Glacier, Montana. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2024/04/18). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.