Observation 96900: Phragmidium tuberculatum Jul. Müll.
When: 2012-06-09
Who: Byrain
Herbarium specimen reported

Notes: Growing on the leaves of a ornamental rose (Rosa sp.)

Urediospores
Thin wall 1 – 2 µm, slightly roughened.
Spore range = (22) 24 – 27 (28) x (17) 19 – 22 µ
Average spore = 25.4 × 20.07 µ
Average Q = 1.28
15 urediospores measured.

Teliospores (Pedicels not measured)
Spore range = (65) 67 – 83 (88) x (31) 33 – 35 (36) µ
Average spore = 76.1 × 34.3 µ
Average Q = 2.22
10 teliospores measured.

I haven’t been able to key this convincingly in either “Phragmidium Species of North America” or “North American Rose Rusts”, I suspect I need something more recent…

Species Lists

Images

226479
Teliospores, 400x, mounted in KOH, 2.44 µ divisions
226480
Underside
226481
Underside
226482
Upperside
226483
226484
Uredium section , 100x, Mounted in KOH
226485
400x, mounted in KOH
226486
Urediospores, 1000x, mounted in KOH
226487
Urediospores, 1000x, mounted in KOH
226488
Telia section, 100x, mounted in KOH
226489
Teliospores, 400x, mounted in KOH, 2.44 µ divisions
226490
Teliospores, 400x, mounted in KOH, 2.44 µ divisions
226491
Teliospores & urediospores, 400x, mounted in KOH, 2.44 µ divisions
226492
Teliospores, 1000x, mounted in KOH, 1 µ divisions
226493
Teliospores, 1000x, mounted in KOH, 1 µ divisions
226494
Teliospores, 1000x, mounted in KOH, 1 µ divisions

Proposed Names

57% (1)
Recognized by sight
85% (1)
Eye3 Eyes3
Recognized by sight
Used references: Morphological analyses of urediniospores and teliospores in seven Phragmidium species parasitic on ornamental roses – Dono Wahyuno, Makoto Kakishima and Yoshitaka Ono
http://virtualmycota.landcareresearch.co.nz/...
Based on microscopic features

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Set up
By: Byrain
2012-06-12 11:26:59 PDT (-0700)

Thanks, I’m using a microscope like this: http://www.ebay.com/... and a Canon PowerShot Elph 310HS pointed down the eyepiece, its a bit lacking in features, but it works pretty well for microscopy minus the lens size which doesn’t quite doesn’t fit as well as my old 3mp battery killer did. Though, for this observation, using unsharp mask filter in gimp really brought out an amazing level of detail.

real pretty micrographs
By: Danny Newman (myxomop)
2012-06-12 03:01:28 PDT (-0700)

what’s your setup?

Created: 2012-06-09 21:44:05 PDT (-0700)
Last modified: 2012-06-11 13:45:47 PDT (-0700)
Viewed: 404 times, last viewed: 2016-12-10 01:19:36 PST (-0800)
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