. Carnegie Institution of Washington publication. THK VOL'NO SI'OKOPHYI 1 157 Daneea, , /). elliptica; but in I), jenmani and in I), ^amatcensts, as well as in most of the other species, the stem finally becomes dorsiventral, as it is from the firsr in Kaulfussia. The development of the second leaf is marked by an increased activity in the apical meristem, quite close to the apical cell, and it is clear that the leaf arises from the younger segments, but it is impossible to state exactly what the relation of the young leaf is to the younger segments of the apical cell, or to say whether th
. Carnegie Institution of Washington publication. THK VOL'NO SI'OKOPHYI 1 157 Daneea, , /). elliptica; but in I), jenmani and in I), ^amatcensts, as well as in most of the other species, the stem finally becomes dorsiventral, as it is from the firsr in Kaulfussia. The development of the second leaf is marked by an increased activity in the apical meristem, quite close to the apical cell, and it is clear that the leaf arises from the younger segments, but it is impossible to state exactly what the relation of the young leaf is to the younger segments of the apical cell, or to say whether the whole. Fig. 141. A-C. Three transverse sectiuns of primary root of Mtirattia douglatii. D Longitudinal section of apex of primary root. of the leaf is the derivative of a single segment. When the young leaf can first be distinguished it is elevated very slightly above the level of the stem apex and its growing point is composed of a group of columnar cells. Sometimes, especially in Datura, there may be recognized near the center of this group of cells a single, somewhat larger one, which may be interpreted as a single apical cell, but this is not always Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Carnegie Institution of Washington. Washington, Carnegie Institution of Washington
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Keywords: ., bookauthorcarnegie, bookcentury1900, bookdecade1910, bookyear1911
