Skye Flora

Alpine Hair-grass


Deschampsia alpina

Taxonomic note: sometimes treated as D cespitosa ssp alpina

Deschampsia alpina

Photo © Carl Farmer
17 Jul 2003 Storr, Isle of Skye
10.5 cm from lowest branches to stem tip

Rare on damp ground in mountains

Glumes c 4-7 mm long.

Skye ID: At least some (usually all) spikelets viviparous.  Lemmas with a notch in the tip deeper than wide - this separates it from D caespitosa which can on rare occasions be viviparous, but has lemmas only shallowly toothed at tip.

Other features: Ligule 3-10 mm long. pointed.  Leaves narrow, often inrolled upwards, sometimes to make a complete tube.  Spikelets variegated as in other Deschampsia sp, a mixture of purple, silver, gold, and green.  Non-viviparous spikelets, if any are present, have lemmas with a short awn from the middle or the top half of the lemma, whereas in D cespitosa the awn is from near the base.  Viviparous spikelets often have lemmas longer, greener and without awns or with a short point in the centre of the notched tip.

 

Deschampsia alpina

Photo © Carl Farmer
17 Jul 2003 Storr, Isle of Skye
10.5 cm from lowest branches to stem tip

  Deschampsia alpina

Photo © Carl Farmer
17 Jul 2003 Storr, Isle of Skye


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