Staurastrum sexangulare (Bulnheim) P. Lundell
Reference: Bulnheim 1861
Remarks: Originally described as Didymocladon sexangularis.
From the Schwemm in Austria two forms were collected. A large 6- and 7-radiate form, indicated below as forma A, and a smaller 5-radiate form, indicated below as forma B, with more flattened cells and the two whorls of processes more fused together at their basis.

Forma A (7-radiate)


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Front view
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Front view
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Accessory process.
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Front view
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Front view
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Focus on the reverse side.
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Apical view
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Upper whorl of the upper semicell.
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Lower whorl of the upper semicell.
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Lower whorl of the lower semicell.
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Apical view
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Upper whorl of the lower semicell with an accessory process.

Forma A (6-radiate)


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Front view
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Front view
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Front view
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Apical view
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Upper whorl of the upper semicell.
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Apical view
Austria
Lower whorl of the upper semicell.
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Apical view
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Lower whorl of the lower semicell.
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Upper whorl of the lower semicell.

Forma B (5-radiate)


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Front view
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Front view
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Front view
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Front view
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Front view
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Front view
Austria
Focus on the reverse side.
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Apical view
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Apical view
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Apical view
Austria
Infected with with fungal parasites
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Apical view
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Apical view
Austria
All photos copyright: © 2009-2021 Alfred van Geest - Send comments to asvg@xs4all.nl