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Below the Viewdeck: Roof Materials from Cogon Grass

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(DSC01026) Cogon Grass, Blady Grass or Kunai Grass (Imperata cylindrica). It is a perennial rhizomatous grass native to east and southeast Asia, India, Micronesia, Australia, and eastern and southern Africa. It grows from 0.6–3 m (2–10 feet) tall. The leaves are about 2 cm wide near the base of the plant and narrow to a sharp point at the top; the margins are finely toothed and are embedded with sharp silica crystals. The main vein is a lighter colour than the rest of the leaf and tends to be nearer to one side of the leaf. The upper surface is hairy near the base of the plant while the underside is usually hairless. Roots are up to 1.2 meters deep, but 0.4 m is typical in sandy soil... Anecdotal and empirical evidence suggests that types of this grass are quite flammable even when apparently green - particularly in Southeast Asian climates. It is not uncommon to see hillsides of cogon grass on fire. A common expression in the Philippines is "ningas cogon" (cogon brush fire). It is a figure of speech for procrastination, specifically people who show a fervent interest in a new project but lose interest quickly. It's in reference to the propensity of cogon grass to catch fire and burn out quickly. (Taken from http://en.wikipedia.org/wiki/Imperata_cy lindrica)

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1 comment

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    • photo of success2020
    • A beautiful photograph and a wonderful explanation.

    • said success2020

    • 9 months 18 days ago

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