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The leaf sheath colour was observed and scored directly and the tiller angle was measured for each plant.

Hard pines retain the leaf sheath until the leaves are shed.

This prevents rain soaking down inside the leaf sheath, but lets it run down the outside to the root where it is needed.

L Lemmathe flowering glume of a grass, 15.Ligulethe thin, scarious projection found at the top of the leaf sheath where it joins the blade in grasses, 3.Lodiculea small scale outside the stamens in the flower of grasses.