William G. Eickmeier, Elisabeth E. Schussler, Responses of the Spring Ephemeral Claytonia virginica L. to Light and Nutrient Manipulations and Implications for the "Vernal-Dam" Hypothesis, Bulletin of the Torrey Botanical Club, Vol. 120, No. 2 (Apr. - Jun., 1993), pp. 157-165
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Eickmeier et al. (1993) studied this question.
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