Comparative Seed Germination Biology and Seed Propagation

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Castilleja exilis This scarlet-flowered annual species of wetland habitats had a short chilling requirement, with full germination of seeds in postchilling incubation for both populations after only 4 weeks of chilling (table 2). There was no evidence for mechanisms, such as the presence of a chilling-nonrespon-

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Castilleja exilis This scarlet-flowered annual species of wetland habitats had a short chilling requirement, with full germination of seeds in postchilling incubation for both populations after only 4 weeks of chilling (table 2). There was no evidence for mechanisms, such as the presence of a chilling-nonrespon-
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