Meyer, S.E.; Kitchen, S.G.; Carlson, S.L. 1995. Seed germination timing patterns in Intermountain Penstemon (Scrophulariaceae). American Journal of Botany. 82(3): 377-389.

Meyer, S.E.; Kitchen, S.G.; Carlson, S.L. 1995. Seed germination timing patterns in Intermountain Penstemon (Scrophulariaceae). American Journal of Botany. 82(3): 377-389.

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