Breaking primary seed dormancy in Gibbens’ beardtongue (Penstemon gibbensii) and blowout penstemon (Penstemon haydenii)

REFERENCES

1. 1. Allen PS,
   2. Meyer SE.

   1990. Temperature requirements for seed germination of three Penstemon species. HortScience 25:191–193.

   OpenUrlAbstract/FREE Full Text
2. 1. [AOSA] Association of Official Seed Analysts

   . 1988. Rules for testing seeds. Beltsville (MD): Association of Official Seed Analysts. p 126.
3. 1. Baskin JM,
   2. Baskin CC.

   2004. A classification system for seed dormancy. Seed Science Research 14:1–6.

   OpenUrlWeb of Science
4. 1. Beckstead J,
   2. Meyer SE,
   3. Allen PS.

   1996. Bromus tectorum seed germination: between-population and between-year variation. Canadian Journal of Botany 74:875–882.

   OpenUrl
5. 1. Bewley JD,
   2. Bradford KJ,
   3. Hilhorst H,
   4. Nonogaki H.

   2013. Seeds: physiology of development, germination, and dormancy. 3rd ed. Berlin, Germany: Springer Science and Business Media.
6. 1. Cavieres LA,
   2. Arroyo MTK.

   2001. Persistent soil seed banks in Phacelia secunda (Hydrophyllaceae): experimental detection of variation along an altitudinal gradient in the Andes of central Chile (33°S). Journal of Ecology 89:31–39.

   OpenUrlCrossRefWeb of Science
7. 1. Flessner TR,
   2. Stubbendieck J.

   1989. Propagation of blowout penstemon (Penstemon haydenii S. Watson): germination enhancing treatments. Transactions of the Nebraska Academy of Sciences 17:65–70.

   OpenUrl
8. 1. Ghersa CM,
   2. Benech-Arnold RL,
   3. Martinez-Ghersa MA.

   1992. The role of temperature in germination and establishment of Sorghum halepense. Regulation of germination at increasing depths. Functional Ecology 6:460–468.

   OpenUrl
9. 1. Grab DF

   editor. 1970. Tetrazolium testing handbook for agricultural seeds. Handbook on seed testing. Springfield (IL): Association of Official Seed Analysts. p 62.
10. 1. Heidel B.

    2009. Survey and monitoring of Penstemon gibbensii (Gibben’s beardtongue) in South-Central Wyoming. Prepared for the Bureau of Land Management-Wyoming State and Rawlins Field Offices. Wyoming Natural Diversity Database. Laramie (WY): University of Wyoming.
11. 1. Heidel B.

    2012. Status of Penstemon haydenii (blowout penstemon) in Wyoming–2012. Prepared for the Bureau of Land Management-Rawlins Field, Rock Springs Field, and Wyoming State Offices. Wyoming Natural Diversity Database. Laramie (WY): University of Wyoming.
12. 1. Hilhorst HWM,
    2. Karssen CM.

    1992. Seed dormancy and germination: the role of abscisic acid and gibberellins and the importance of hormone mutants. Plant Growth Regulation 11(3):225–238.

    OpenUrlCrossRef
13. 1. Kitchen SG,
    2. Meyer SE.

    1991. Seed germination of Intermountain penstemons as influenced by stratification and GA3 treatments. Journal of Environmental Horticulture 9:51–56.

    OpenUrl
14. 1. Meyer SE.

    1992. Habitat-correlated variation in firecracker penstemon (Penstemon eatonii Gray: Scrophulariaceae) seed germination response. Bulletin of the Torrey Botanical Club 119:268–279.

    OpenUrlCrossRefWeb of Science
15. 1. Meyer SE,
    2. Kitchen SG.

    1994. Habitat-correlated variation in seed germination response to chilling in Penstemon section Glabri (Scrophulariaceae). American Midland Naturalist 132:349–365.

    OpenUrl
16. 1. Meyer SE,
    2. Monsen SB.

    1991. Habitat-correlated variation in mountain big sagebrush (Artemesia tridentata ssp. Vaseyana) seed germination patterns. Ecology 72:739–742.

    OpenUrlCrossRefWeb of Science
17. 1. Meyer SE,
    2. Kitchen SG,
    3. Carlson SL.

    1995. Seed germination timing patterns in Intermountain Penstemon (Scrophulariaceae). American Journal of Botany 82:377–389.

    OpenUrlCrossRefWeb of Science
18. 1. Meyer SE,
    2. Quinney D,
    3. Weaver J.

    2005. A life history study of the Snake River Plains endemic Lepidium papilliferum (Brassicaceae). Western North American Naturalist 65:11–23.

    OpenUrlWeb of Science
19. 1. Thompson PA.

    1974. Effects of fluctuating temperatures on germination. Journal of Experimental Botany 25:164–175.

    OpenUrlAbstract/FREE Full Text
20. 1. Tilini KL.

    2013. The seed ecology of rare and endangered Gibbens’ beardtongue (Penstemon gibbensii) and blowout penstemon (Penstemon haydenii) [MS thesis]. Provo (UT): Brigham Young University.
21. 1. [USDA NRCS] USDA Natural Resources Conservation Service

    . 2016. The PLANTS database. URL: http://plants.usda.gov (accessed 16 Feb 2016). Greensboro (NC): National Plant Data Team.
22. 1. US Fish and Wildlife Service

    . 1987. Final rule to determine Penstemon haydenii (blowout penstemon) to be an endangered species. Federal Register 52(169):32926–32929.

    OpenUrl
23. 1. Venable LD,
    2. Lawlor L.

    1980. Delayed germination and dispersal in desert annuals: escape in space and time. Oecologia 46:272–282.

    OpenUrlCrossRefWeb of Science