Hazel (common hazel: upper left and Turkish hazel: lower left) flower.
Grey alder (lower right) has started to flower.
Black alder (upper right) has made a development boost, but not yet reached the readiness to flower.

#pollenforecast at the #PollenserviceVienna MedUni Wien

#motivation
How I take (sometimes) pictures, when encountering something interesting. Because we keep you informed about the development of allergenic plants.

#pollenservicevienna #meduniwien on the go

What means „ready to flower“?

The flower is mature enough to flower and release first pollen as soon as the conditions are favorable.
Macro shot: the covering scales are raised, the anthers become visible.

#pollenservicevienna #meduniwien on the go

The main pollination period of Spaeth´s #alder has started in the Christmas week as expected.

You can see the pollen bursting out of the catkins. Pollination of this plant is possible if temperatures are above 0 degrees Celsius.

More at the #pollenservicevienna of the #meduniwien

We from the #pollenservicevienna of the #medunivienna wish all persons concerned by #pollen #allergy and all interested in #nature as well as all reading this post a festive season and a Happy New Year 2025!

We keep you informed about professional aspects also during the holidays.

Last working day at the #pollenservicevienna of the #medunivienna: all routines need to be completed.

phenology
pollen trap
preparation
update of the forecasts

Have a nice evening!

We keep working also the next days and weeks for you.
All Information on the Website also in English.

Be prepared: Spaeth´s #alder is ready to flower in #Vienna!

Pollination has to be expected during the current mild weather and on days without precipitation and storm.

More on the website of the #pollenservicevienna of the #meduniwien
www.meduniwien.ac.at/web/en/polle...

There is beauty also on hazy days.

You can find #dandelions like this still now (!).
Reminder: this is no #pollen, this is #seed.

Wishing you a pleasant weekend!
#pollenservicevienna #meduniwien on the go

We found thickened spikelets of #switchgrass (#Panicum sp.) in the end of November. Here you can see the purple anthers (=pollen sacks) in the middle after preparation at home.

Obviously, such a late flower did not work.

#pollenservicevienna #meduniwien on the go

Status of early bloomers

The catkins of #hazel and #alder are closed. Those most developed are the catkins of Spaeth´s alder, that will flower as first species (first photo).
There is no measurable pollination.

#pollenservicevienna #meduniwien keeps at it

Dear valued pollen audience,

Today a before/after comparison of fountain #grass (#Pennisetum sp.).
On the top flowering in the end of June 2024 and at the bottom now in November.
Some spikelets (=flower) are completely gone.

Did you ever see it?

#pollenservicevienna #meduniwien on the go

How was the #pollen season 2024?

We provide facts and a review of the most important #aeroallergens (here as an example the #birch pollen season in #Vienna).

More on the website of the #pollenservicevienna of the #meduniwien:

www.meduniwien.ac.at/web/en/polle...

Enjoy the #sunrays!

Many plants, that flowered in october and november, faded flowering. Like here #rosemary (photo from yesterday).

Thanks to @marcuswadsak.bsky.social for the forecast concerning beautiful sunsets: definitively true.

#winteriscoming
#PollenserviceVienna @MedUni_Vienna on the go

Currently you can observe leaf fall of #ginkgo.
The leaves are golden yellow.

Ginkgo biloba is a #livingfossil and has survived from the time of the dinosaurs until today in China. It is planted globally.

#PollenserviceVienna #meduniwien on the go

The Alpine Bioaerosol Research project of the #SonnblickObservatorium of #GeosphereAustria and the #pollenservicevienna of the #MeduniVienna validates a Poleno and performs research with a focus on Alpine pollen dispersal and long distant transport. To a good cooperation!