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  1. Breaking primary seed dormancy in Gibbens' beardtongue (Penstemon gibbensii) and blowout penstemon (Penstemon haydenii)

    This study established that chilling removes primary seed dormancy in 2 rare penstemons of the western US, Gibbens’ beardtongue (Penstemon gibbensii Dorn [Scrophulariaceae]) and blowout penstemon (Penstemon haydenii S. Watson). Wild-harvested seeds were subjected either to moist chilling at 2 to 4 °C (36-39 °F) for 0, 4, 8, 12, and 16 wk or to approximately 2 y of dry...

    Author(s):
    Kassie L. Tilini; Susan E. Meyer; Phil S. Allen
    Year:
    2016
    Keywords:
    alternating temperature, cold stratification, dry after-ripening, habitat-correlated, pre-chilling, seed germination, Scrophulariaceae
    Source:
    Native Plants. 17(3): 256-266.
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https://www.fs.usda.gov/treesearch/search?keywords=%22Scrophulariaceae%20%22&f%5B0%5D=type_description%3A%22Scientific%20Journal%20%28JRNL%29%22&f%5B1%5D=nrt_combined%3A%22Ecology%2C%20Ecosystems%2C%20%26%20Environment%22&f%5B2%5D=nrt_combined%3A%22Natural%20Resource%20Management%20%26%20Use%22