Alga? - On Holly and Yew

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Lancashire Lad
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Alga? - On Holly and Yew

Post by Lancashire Lad » Sun Jun 14, 2015 2:52 pm

Hi all,

I've seen this several times on the live leaves of one particular Holly bush, and one particular Yew tree in a local woodland.
The two trees are about 200m apart. - but this seems to be the same thing attacking both of them.
In each case, the infection? is localised, and the affected leaves occupy an area of about 1-2m overall.

First time I saw it I thought it might be fungal, but having finally got around to examining it more closely, I'm thinking it might be an alga.

Does anyone out there have any suggestions as to what it is?

Click on images to view at full size.
Holly.jpg
Affected Holly Leaf.
Yew.jpg
Affected Yew Leaf.
Alga x400.jpg
x400 Mounted in Water.

Regards,
Mike.
Common sense is not so common.

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adampembs
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Re: Alga? - On Holly and Yew

Post by adampembs » Sun Jun 14, 2015 4:31 pm

Scroll down two posts :-)
Adam Pollard
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Lancashire Lad
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Re: Alga? - On Holly and Yew

Post by Lancashire Lad » Sun Jun 14, 2015 6:11 pm

Cheers Adam - Don't know how I managed to miss that thread. :oops:

But it confirms (I think) what I'd just found.

I've just been searching the web for info and had found (on Bioimages website) what I think must be the same thing on Ivy leaves: -

I believe both of mine must also be: -
Phycopeltis arundinacea (Mont.) De Toni, 1889 (an epiphytic green alga).

http://www.bioimages.org.uk/html/r163994.htm




Regards,
Mike.
Common sense is not so common.

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