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polyarch

polyarch Sentence Examples

  • polyarch according as it contains one, two,.

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  • The stem had a single stele, the primary xylem of which was polyarch and centripetally developed.

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  • The axis of the cone in Cheirostrobus contains a polyarch stele, with solid wood, from the angles of which vascular bundles pass out, dividing in the cortex, to supply the various segments of the sporophylls.

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  • polyarch according as it contains one, two,.

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  • While the stele of the primary root in both Gymnosperms and Angiosperms is usually diarch or tetrarch, the large primary root-steles of many adventitious roots are frequently polyarch, sometimes with a very large number of protoxylems. Such a stale seldom has the centre filled up with xylem, this being replaced by a large-celled pith, so that a siphonostelic structure is acquired (fig.

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  • The stem had a single stele, the primary xylem of which was polyarch and centripetally developed.

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  • The axis of the cone in Cheirostrobus contains a polyarch stele, with solid wood, from the angles of which vascular bundles pass out, dividing in the cortex, to supply the various segments of the sporophylls.

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