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Dissecting microscope photographs of longitudinal sections of endosperm in radicle-emerged seeds of Viburnum betulifolium collected in 2007 and incubated in light at 20/10 °C for 12 (A) and 16 (B) weeks and at 5 °C in the dark for 12 (C) and 16 (D) weeks, when seeds were ready to germinate. Abbreviations: Ec, endocarp; Es, endosperm; SC, seed coat.
