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Festuca rubra ssp. litoralis | by Rense Haveman
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Festuca rubra ssp. litoralis

Harbour, Vlieland


Characteristic for the Festuca rubra aggregate are the islands of sclerenchyma below/next to the (most important) veins. It is hardly recognisable in this photo, but you can see it under the central vein as a small lighter, colourless region next to the cuticula. There are sclerenchyma strings next to the other larger veins too, but next to the smaller ones there are only a few cells visible.

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Taken on May 23, 2015