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PalDat - Palynological Database

an online publication on recent pollen

Rhododendron williamsianum

Taxonomy: Angiospermae, Ericales, Ericaceae, Rhododendron

Published: 2016-07-07

Pollen Description

Shape, Size and Aperture

pollen unit: tetrad,  dispersal unit and peculiarities: tetrad tetrahedral,  size (pollen unit): large (51-100 µm),  size of hydrated pollen (LM): -,  shortest polar axis in equatorial view (LM): -,  longest polar axis in equatorial view (LM): -,  shortest diameter in equatorial or polar view (LM): -,  longest diameter in equatorial or polar view (LM): -,  pollen class: tetrad,  polarity: heteropolar,  P/E-ratio: -,  shape: no suitable term,  outline in polar view: circular,  dominant orientation (LM): -,  P/E-ratio (dry pollen): -,  shape (dry pollen): irregular,  outline in polar view (dry pollen): irregular,  infoldings (dry pollen): irregularly infolded,  aperture number: 3,  aperture type: colporus,  aperture condition: colporate, tricolporate,  aperture peculiarities: -

Ornamentation and Structure

LM  ornamentation LM: -,  nexine: -,  sexine: -,  SEM  ornamentation SEM: no suitable term,  suprasculpture SEM: -,  TEM  tectum: -,  infratectum: -,  foot layer: -,  endexine: -,  intine: -,  wall peculiarities: viscin threads,  supratectal element: -

Miscellaneous

pollen coatings: -,  reserves in cytoplasm: -,  cell number: -,  Ubisch bodies: -

Annotations: ornamentation verrucate to reticulate and fossulate; many tetrads irregular in shape due to aborted monads

Author(s) of diagnosis: Halbritter, Heidemarie

Pictures

habitus

1. habitus

flower(s)

2. flower(s)

hydrated pollen

3. hydrated pollen

tetrad

4. tetrad

tetrad

5. tetrad

tetrad

6. tetrad

aperture

7. aperture

exine surface

8. exine surface

exine surface,viscin thread

9. exine surface, viscin thread

dry pollen

10. dry pollen

Picture legend

  1. habitus, photographer: Buchner, R.
  2. flower(s), photographer: Buchner, R.
  3. hydrated pollen - dry, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
  4. tetrad - dry, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
  5. tetrad - dry, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
  6. tetrad - dry, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
  7. aperture - dry, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
  8. exine surface - dry, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
  9. exine surface, viscin thread - dry, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
  10. dry pollen - dry, sputter coated with gold, photographer: Halbritter, H.

Literature

  • Halbritter, H (1998) Preparing living pollen material for scanning electron microscopy using 2,2-dimethoxypropane (DMP) and criticalpoint drying. Biotechnic Histochem 73: 137–143

Copyright and Citation

Cite this publication as:

Halbritter H., Buchner R. 2016. Rhododendron williamsianum. In: PalDat - A palynological database. https://pc8.botanik.univie.ac.at/pub/Rhododendron_williamsianum/301176;jsessionid=015FC4FD1F7026B70F8E5A1ABAF80B5A; accessed 2025-01-25