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In page Cotyledon:

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Related plants may show a mixture of hypogeal and epigeal development, even within the same plant family. Groups which contain both hypogeal and epigeal species include, for example, the Southern Hemisphere conifer family Araucariaceae,[5] the pea family, Fabaceae,[1] and the genus Lilium (see Lily seed germination types). The frequently garden grown common bean, Phaseolus vulgaris, is epigeal, while the closely related runner bean, Phaseolus coccineus, is hypogeal.[citation needed]