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| Unstained Images from Coffee Leaf
Blade (above) |

Coffee Midrib stained with Phloroglucinol: The red color indicates the presence of Lignin |

Coffee Midvein stained with Phloroglucinol: The red color indicates the presence of
Lignin. |
Same viewed with Crossed Polarizers: Thick-walled cells are
bright (birefringent). |
| Coffee Midrib Stained with
Phloroglucinol (above) |

Photo by Candace Felling |

Photo by Candace Felling |

Photo by Candace Felling |
| Koa
Stem X-sec stained with Phloroglucinol & viewed with crossed Polarizers. |
Young
Secondary Xylem X-sec from a Koa Stem stained with Phloroglucinol |
Mature
Secondary Xylem X-sec from a Koa Stem stained with Phloroglucinol |
| Young Koa Stem Sections Stained with
Phloroglucinol (above) |