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 Podocarpus Stem Cross-Section Stained with Phloroglucinol - Note the lignified cells in the Xylem & Phloem. |
| Gymnosperm wood contains only Tracheids. The absence of Vessel Members lends an homogenous appearance to these woods. However, tracheids produced under good growing conditions (Early Wood) have wider diameters and thinner walls than those produced at the end of the growing season (Late Wood). This results in structural and functional specialization. The "early wood" is designed for the best conduction while the "late wood" is better for support. | |
 Pinus Secondary Xylem showing Early (Top) and Late Wood (Bottom) |
 Podocarpus Secondary Xylem stained with Phloroglucinol - Note the alternating patters of early and late wood. |
