File:The Canadian field-naturalist (1967) (20520046735).jpg

Title: The Canadian field-naturalist
Identifier: canadianfieldnat1967otta (find matches)
Year: 1967 (1960s)
Authors: Ottawa Field-Naturalists' Club
Subjects:
Publisher: Ottawa, Ottawa Field-Naturalists' Club
Contributing Library: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
Digitizing Sponsor: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library

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1967 Maini and Wang: Yellow Birch 131
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Figure 2. Various stages in the normal germination of Betula alleghaniensis seeds. A — dorsal view of a seed; B — a seed dissected open along the suture showing normal positioning of the radicle; C — ventral view of a seed showing emergence of radicles from micropylar end; D — side view of seed showing splitting of the pericarp along the sutures; E, F and G — elongation of radicle and subsequent shedding of the pericarp. anchored in the soil; subsequently, the hypocotyl elongates and raises the cotyledons above the forest floor. The cotyledons soon separate and become approximately horizontal. In three seedlings, we observed the emergence of cotyledons from the dorsal side of the seed where the pericarp had burst (Figure 3A). After the emergence of the plumule, the hypocotyl elongated considerably (Figure 3B-C),

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