Astragalus (convallarius)
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Hannah Demler Innovative Restoration Technician 258 Main St Suite 200 Lander, Wyoming 82520 hannah.demler@tnc.org |
| Family Scientific Name: | Fabaceae | ||
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| Family Common Name: | Pea Family | ||
| Scientific Name: | Astragalus convallarius | ||
| Common Name: | lesser rushy milkvetch | ||
| Species Code: | ASCO12 | ||
| Ecotype: | Fremont County, Wyoming | ||
| General Distribution: | A. convallarius is found throughout the Mountain West of the United States and is commonly found in sagebrush. | ||
| Propagation Goal: | Plants | ||
| Propagation Method: | Seed | ||
| Propagule Collection: |
Fruit is a pod. Seed is dark brown in color. Seed is collected when the pods dry out but before they begin to split. Plants do not hold the seed after pods split. Seed pods on a given plant ripen irregularly throughout the late summer, with only a few pods ripening at once on a single plant. Seed was stored in paper or cloth bags at room temperature until cleaned and then vacuum sealed and placed in a freezer for long term storage. Seeds/lb for this ecotype was ~109,090 |
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| Propagule Processing: | Seeds have a hard seed coat and exhibit physical dormancy (PY) | ||
| Pre-Planting Treatments: |
Seeds need to be scarified prior to germination. In a germination trial, un-scarified seeds had an average percent germination of only 11.25% after a 28-day incubation at room temperature. Seeds that were scarified by hand with sandpaper displayed 100% germination after a 28-day incubation at room temperature. Seeds were scarified with fine grit sandpaper for 30-90 seconds until seed coat abrasion was observed under a microscope. Subsequent scarification testing indicated that seeds will germinate successfully (>75%) after various mechanical scarification treatments. A germination trial was also conducted on scarified seeds to determine optimum germination temperature. Growth chambers were set to three different diurnal temperature regimes, corresponding to the average temperatures in Fremont county, WY in May, June and July (4/19° C, 9/25° C, or 12/30° C respectively). The highest average germination was obtained after 28 days under the 12/30° C temperature regime, corresponding to average temperatures in July (88% germination). |
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Citation:
2023. Propagation protocol for production of Astragalus convallarius Plants Lander, Wyoming. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2024/05/18). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.
