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Brown spot on fiber of goldenrod seed parasail

 
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rjlittlefield
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Joined: 01 Aug 2006
Posts: 17696
Location: Richland, Washington State, USA

PostPosted: Sun Nov 26, 2006 1:16 pm    Post subject: Brown spot on fiber of goldenrod seed parasail Reply with quote

Last night I posted some shots of goldenrod seed over in the macro forum.

MacroLuv asked about some small brown spots visible in one of the shots, so I took an even closer look.

40X NA 0.65 objective, 10X eyepiece, Canon PowerShot SD 700 IS at minimum and maximum zoom, plus some cropping.
Image of stage micrometer overlaid in Photoshop.



Pollen, you think? The appearance seems right, but the size seems a bit small (5-7 microns diameter -- this is a big one).

--Rik

[Edited from initial post -- photo elements re-arranged to match the macro images better.]


Last edited by rjlittlefield on Sun Nov 26, 2006 1:49 pm; edited 1 time in total
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Ken Ramos



Joined: 27 Jul 2006
Posts: 6911
Location: lat=35.4005&lon=-81.9841

PostPosted: Sun Nov 26, 2006 1:47 pm    Post subject: Reply with quote

Unless there are quite a number of them, could be a wayard spore from something else. 5 to 7 um is pretty small for a grain of pollen but then again you got to consider the size of the flower I suppose. Smile
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Ken 2014
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MacroLuv



Joined: 28 Aug 2006
Posts: 1964
Location: Croatia

PostPosted: Tue Nov 28, 2006 7:41 am    Post subject: Reply with quote

Very impressive, Rik. Very Happy
It even shows some structure, kind of radial stripes.
Two others, I saw at second look, are about half smaller.
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MacroLuv



Joined: 28 Aug 2006
Posts: 1964
Location: Croatia

PostPosted: Wed Nov 29, 2006 3:53 pm    Post subject: Reply with quote

Something forced me to look back on this picture... if it is a living creature... I could swear I saw it releasing cluster of eggs. Shocked
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errors are welcome. Very Happy
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