Grindelia (squarrosa)
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Derek Tilley PMC Manager USDA NRCS - Aberdeen Plant Materials Center PO Box 296 Aberdeen, Idaho 83210 208-397-4133 x 104 derek.tilley@id.usda.gov http://plant-materials.nrcs.usda.gov/idpmc |
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| Family Scientific Name: | Asteraceae | ||
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| Family Common Name: | Sunflower family | ||
| Scientific Name: | Grindelia squarrosa (Pursh) Dunal | ||
| Common Name: | Curlycup gumweed | ||
| Species Code: | GRSQ | ||
| Ecotype: | Jackpot, Nevada | ||
| General Distribution: | Curlycup gumweed is a native, short-lived perennial forb found throughout North America with the exception of the Southeastern states. | ||
| Known Invasiveness: | This species will establish on disturbed soils and is commonly found on roadsides and ditches. It is unpalatable and can increase under improper grazing management. | ||
| Propagation Goal: | Plants | ||
| Propagation Method: | Seed | ||
| Propagule Collection: | Seed was hand collected from a wildland stand north of Jackpot, Nevada. Seed was beaten off of the plants with a racquet into a collecting hoop. | ||
| Propagule Processing: | Seed was laid out to dry for several weeks prior to processing. The collection was run through a hammermill followed by cleaning with a multi-deck air-screen cleaner. Seed was approximately 90-95% pure. The seed was approximately 1 year old at the time of testing. | ||
| Pre-Planting Treatments: |
We tested germination with three pre-treatments, 1) aerated water bath, 2) non-aerated water bath, and 3) non treated control. For the aerated bath we placed approximately 400 seeds in a fine mesh bag and submerged the seed into a mason jar filled with water. We inserted an aquarium bubbler for aeration. The non-aerated treatment was the same, minus the bubbler. For the non-treated control we placed 100 seeds on wet blotter paper in petri dishes and put the dishes into Ziploc bags to retain moisture. All were placed in a growth chamber for 5 days with a 12 hour light/dark cycle with 22 C day and 15 C night temperatures. Each treatment was replicated 4 times. Average germination for the aerated water bath was 34%. The non-aerated treatment yielded the lowest germination at 1%, and the non-treated control had 10% germination. |
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Citation:
Tilley, Derek. 2017. Propagation protocol for production of Grindelia squarrosa (Pursh) Dunal Plants USDA NRCS - Aberdeen Plant Materials Center Aberdeen, Idaho. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2024/07/03). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.
