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Research Article

Cold Stratification of Pacific Madrone Seeds

Constance A Harrington and Joseph M Kraft
Native Plants Journal, March 2004, 5 (1) 66-74; DOI: https://doi.org/10.2979/NPJ.2004.5.1.66
Constance A Harrington
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Joseph M Kraft
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Abstract

Cold moist stratification for 40 d resulted in excellent (≥ 87%) germination for 11 seed lots of Pacific madrone (Arbutus menziesii Pursh. [Ericaceae]) from California, Oregon, and Washington. Without stratification, germination was < 2%. Stratification periods longer than 40 d yielded little or no gain for most lots and resulted in premature germination and development of seed coat molds. Germination after 20 d of stratification varied markedly with seed lot (from 10% to 100% of the maximum); 20-d germination was negatively correlated with latitude but not with elevation or mean winter temperature. Growers would need to test individual seed lots to determine if stratification times < 40 d would be adequate; such testing is most likely to be warranted with lots from California or southern Oregon.

  • Arbutus menziesii
  • germination
  • seed lots
  • latitude
  • elevation
NOMENCLATURE
  • USDA NRCS (2002)
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Native Plants Journal: 5 (1)
Native Plants Journal
Vol. 5, Issue 1
20 Mar 2004
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Cold Stratification of Pacific Madrone Seeds
Constance A Harrington, Joseph M Kraft
Native Plants Journal Mar 2004, 5 (1) 66-74; DOI: 10.2979/NPJ.2004.5.1.66

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Cold Stratification of Pacific Madrone Seeds
Constance A Harrington, Joseph M Kraft
Native Plants Journal Mar 2004, 5 (1) 66-74; DOI: 10.2979/NPJ.2004.5.1.66
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Keywords

  • Arbutus menziesii
  • germination
  • seed lots
  • latitude
  • elevation
  • USDA NRCS (2002)
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