Fissidens incurva ?

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Fissidens incurva ?

Post by MWP admin » Mon Feb 21, 2011 10:25 am

Moss of the week!

I hope I got it right despite the Genus relies on very ambiguous characters such as the margin of the leaf. Well, i have identified this as Fissidens incurva. it was lying on lowr parts of a Rubble wall in an a clump of accumulated soil. It was shetered, partially shaded, not very damp location (quite dry actually, but maybe becasue of the wind during these 2 days).

Capsule incurved, 1-2mm only (reminds me some part of my dog!)

There was a tug of war beteen viridulus and crispus, but on the whole, the morphology suits best fo incurva. The cells were roughly 8micrometers.
Attachments
Fissidens_sp.jpg
Lamina margin.
Fissidens_sp.jpg (129.32 KiB) Viewed 804 times
Fissidens_sp (4).JPG
The whole plant, 3-5 pairs of leaves, not more than 5mm long, very tall seta holding an incurved, smal lcapsule.
Fissidens_sp (4).JPG (328.22 KiB) Viewed 804 times
Fissidens_sp (2).JPG
The plants compact to each other, very small individuals.
Fissidens_sp (2).JPG (200.96 KiB) Viewed 804 times
Fissidens_sp (1).JPG
The incurved capsules with a red tip. None were dehisced for further inspetion of spores
Fissidens_sp (1).JPG (66.43 KiB) Viewed 804 times
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valerandi
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Post by valerandi » Mon Feb 21, 2011 3:38 pm

Great, I agree with you.

It is difficult to tell all these species apart and in fact the name has now changed as follows:

Fissidens viridulus (Sw. ex anon.) Wahlenb. var. incurvus (Starke ex Röhl.) Waldh.

It is one of the easier mosses to identify when it has sporophytes due to the way the capsules are bent away from the vertical position. It is a moss that grows on soil not rock as you rightly noted.

Best wishes

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Post by MWP admin » Mon Feb 21, 2011 5:05 pm

Thanks, quite glad to get it right. I must make a correction, the capule is smaller, 0.5-1.0mm long.
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