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Molinia arundinacea; Purple Moor-grass   

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Molinia arundinacea
Molinia arundinacea
Purple Moor-grass
Photographer: Dr. Amadej Trnkoczy

ID: 0000 0000 0122 2862 (2022-01-22)

Copyright © 2022 Dr. Amadej Trnkoczy

  • date of photo  Sep 15, 2021
  • latitude 46.35936   longitude 13.70573     View on Google Maps.
  • location   Lower Trenta valley, between villages Soča and Trenta, right bank of river Soča, East Julian Alps (Posočje, Slovenia)
  • family Poaceae
  • notes   Slo.: trstikasta stožka - syn.: Molinia caerulea subsp. arundinacea (Schrank) K. Richt., Molinia altissima Link, Molinia litoralis Host, Molinia poscii Milk. - Habitat: Stony man made road scarp/wall, north aspect, calcareous rocks, open place but mostly in shade, humid air environment; elevation 545 m (1.790 feet); average precipitations ~ 3.000 mm/year, average temperature 7-9 deg C, alpine phytogeographical region. - Substratum: soil among rock. - Comment: Only two species of genus Molinia are growing in Slovenia. Molinia arundinacea is a common grass. It is very similar to Molinia caerulea, which is even more frequent (Ref.: 2). The former species is usually larger (1 – 2 m tall) and has somewhat wider leaves. Characteristically, both species seem to have no nodes on their long stems, at least it looks like that superficially. Actually their uppermost stem node is only a few cm above the ground and is therefore usually covered by leaves and invisible before one takes a close look to the bottom of the stems. Another characteristic of both species are hairs, which replace collar (the area on the outside of leaf at the juncture of the blade and sheath) usually present in grasses. The hairs of Molinia arundinacea are longer than with Molinia caerulea and can be well over 1 mm long (Fig.6). Molinia arundinacea has a very wide habitat amplitude. However, to find one growing in the crevices of stony wall doesn't happen often. - Ref.: (1) Personal communication (conf.) Dr. Igor Dakskobler, Scientific Research Center of the Slovenian Academy of Sciences, Biological Institute Jovan Hadži, Tolmin. (2) N. Jogan (ed.), Gradivo za Atlas flore Slovenije (Materials for the Atlas of Flora of Slovenia), CKSF (2001), p 250. (3) A. Martinči et all., Mala Flora Slovenije (Flora of Slovenia - Key) (in Slovenian), Tehnična Založba Slovenije (2007), p 915. (4) K. Lauber and G. Wagner, Flora Helvetica, 5. Auflage, Haupt (2012), p 1476. (5) D. Aeschimann, K. Lauber, D.M. Moser, J.P. Theurillat, Flora Alpina, Vol. 2., Haupt (2004), p 994.
  • camera   Nikon D700 / Nikkor Micro 105mm/f2.8
  • contributor's ID #  Bot_1404/2021_DSC08551
  • photo category: Plant - annual/perennial

  • common names   Purple Moor-grass (photographer)
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    Using this photo   The thumbnail photo (128x192 pixels) on this page may be freely used for personal or academic purposes without prior permission under the Fair Use provisions of US copyright law as long as the photo is clearly credited with © 2022 Dr. Amadej Trnkoczy. For other uses, or if you have questions, contact Dr. Amadej Trnkoczy amadej.trnkoczy[AT] (Replace the [AT] with the @ symbol before sending an email.)


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