Keywords: The Oak (Marshall Ward) Fig 3.jpg en Fig 3 ” I Longitudinal section through the posterior half of the embryo in a plane at right angles to the plane of separation between the cotyledons slightly magnified II Germinating embryo with one cotyledon removed III Acorn in an advanced stage of germination a the scar s pericarp; sh testa; b plumule; st petioles of cotyledons from between which the plumule b emerges; hc hypocotyl; c cotyledons; f vascular bundles; w radicle primary root ; w secondary roots Root-hairs are seen covering the latter and the anterior part of the primary root in III After Sachs 1892 The Oak A Popular Introduction to Forest-Botany H Marshall Ward PD-old-100 The Oak Marshall Ward Quercus seedlings Germination |