Introduction to the Study of Palontological Botany
Introduction to the Study of Palontological Botany
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The seeds are con- Fig. 66.
Fiir. 68.
Fit?. 69.
sidered by most botanists as being naked, ^. E, not contained in a true pistil (Fig. 69). Some of the conifers have a succu- lent cone, as the juniper (Fig. 70), and the yew (Figs. 71- 73) has a succulent mass covering a single naked seed (Fig. 73). The yew also has its pleurenchyma marked both with punctations and spiral fibres. The arrangement of the punc- tations in the Conifera? gives characters which enable us to classify the woods into group...s that have some relation to the Fig. Q6. Linear leaves of Pinus Strohus, Weymouth Pine, in a cluster of five, with scaly sheath at the base.
Fig. 67. Cone of Pinus sylvestris, Scotch Fir.
Fig. 68. Cone of Ciqjressus semijervirens, common Cypress.
Fig. 69. Scale, 5, of mature cone of Pinus sylvestris, with two naked winged seeds, m m, at its base ; ch marks the chalaza, m the micropyle.
n PAL^ONTOLOGICAL BOTANY.
genera established from the reproductive organs (see Figs. 62-65).
The natural order Cycadaceas is not so largely represented at the present day as it was during the Mesozoic epoch.
What to read after Introduction to the Study of Palontological Botany?
You can find similar books in the "Read Also" column, or choose other free books by John Hutton Balfour to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The seeds are con- Fig. 66.
Fiir. 68.
Fit?. 69.
sidered by most botanists as being naked, ^. E, not contained in a true pistil (Fig. 69). Some of the conifers have a succu- lent cone, as the juniper (Fig. 70), and the yew (Figs. 71- 73) has a succulent mass covering a single naked seed (Fig. 73). The yew also has its pleurenchyma marked both with punctations and spiral fibres. The arrangement of the punc- tations in the Conifera? gives characters which enable us to classify the woods into group...s that have some relation to the Fig. Q6. Linear leaves of Pinus Strohus, Weymouth Pine, in a cluster of five, with scaly sheath at the base.
Fig. 67. Cone of Pinus sylvestris, Scotch Fir.
Fig. 68. Cone of Ciqjressus semijervirens, common Cypress.
Fig. 69. Scale, 5, of mature cone of Pinus sylvestris, with two naked winged seeds, m m, at its base ; ch marks the chalaza, m the micropyle.
n PAL^ONTOLOGICAL BOTANY.
genera established from the reproductive organs (see Figs. 62-65).
The natural order Cycadaceas is not so largely represented at the present day as it was during the Mesozoic epoch.
What to read after Introduction to the Study of Palontological Botany?
You can find similar books in the "Read Also" column, or choose other free books by John Hutton Balfour to read onlineMoreLess
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