I think it's a rust..on Wild Angelica?

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adampembs
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I think it's a rust..on Wild Angelica?

Post by adampembs » Wed Jul 01, 2015 8:39 pm

It has a stem like celery and is perhaps Angelica sylvestris. What appear to be spores are mixed in with what appear to be the plant cells. Strange looking thing.
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Chris Yeates
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Re: I think it's a rust..on Wild Angelica?

Post by Chris Yeates » Wed Jul 01, 2015 9:21 pm

Hi Adam
although everything else except the plant in question is in focus I'm pretty sure that plant is Fool's Water-cress (I'm not saying anything :lol: :lol: ;) ) Apium nodiflorum (note the developing flowers in the leaf axils, not terminal as they would be Angelica). One is allowed to take a leaf or two home to photograph there, where it might be easier - perhaps you did? It would also be useful to know the diameter of those spores/chlamydospores. If I'm right about the host I strongly suspect this to be Buerenia inundata - actually an ascomycete (Taphrinales / Protomycetaceae) but a far from typical one a "strange looking thing" is a justifiable description. A few more pics / bit more info would probably clinch it (the blisters on the leaves, if there are some, should be tinged reddish brown) . . . .
cheers
Chris
"You must know it's right, the spore is on the wind tonight"
Steely Dan - "Rose Darling"

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Re: I think it's a rust..on Wild Angelica?

Post by adampembs » Thu Jul 02, 2015 1:09 am

Yeah, a terrible photo, Im afraid. :oops:

There were indeed some blisters on the leaves. I couldn't see anything interesting under the scope but here are the macro shots.
The spores size range is 52-72 x 48-67µm. I hope that helps.
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Re: I think it's a rust..on Wild Angelica?

Post by Chris Yeates » Thu Jul 02, 2015 4:51 pm

HI Adam
yes that looks right for Buerenia - see:http://www.ascofrance.com/search_recolte/3938 (click on thumbnail). Those 'spores' are actually asci, containing numerous tiny globose spores.
Not (for a change) new to Pembrokeshire: I see there are three records made by the sadly-departed Kenneth Payne, with whom I travelled down from Yorkshire on that 1987 BMS Spring Foray - http://www.fieldmycology.net/FRDBI/FRDB ... a+inundata
cheers
Chris
"You must know it's right, the spore is on the wind tonight"
Steely Dan - "Rose Darling"

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Re: I think it's a rust..on Wild Angelica?

Post by adampembs » Fri Jul 03, 2015 8:45 am

Thanks Chris. Must have been an epic foray, you must have recorded 1000s of species. Still good to get another record every 40 years or so :D
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