Accès membres

Mot de passe perdu? S'inscrire

25-09-2020 18:06

Andgelo Mombert Andgelo Mombert

Bonsoir, Un petit Unguiculariopsis intéressant.

23-09-2020 16:41

Josep Torres Josep Torres

Hola. Pequeñas fructificaciones sobrias la superf

27-09-2020 10:53

Polina Havrysh Polina Havrysh

Dear community!There's a coelomycetes fungus on Ta

26-09-2020 17:20

Gérard MELARD

Bonjour,Je cherche à identifier ce champignon sur

25-09-2020 16:41

Thomas Læssøe

Any thoughts on this one:https://svampe.databasen.

25-09-2020 11:01

Mirek Gryc

Hi One small ascomata (about 8 mm in diameter) fo

24-09-2020 17:08

Garcia Susana

Apotecios estipitados, de hasta 1mm de diámetro.

24-09-2020 16:05

Angel Pintos Angel Pintos

Anybody can help with this?:Rhinocephalum chochrja

05-01-2019 14:57

Edvin Johannesen Edvin Johannesen

These orange "jelly"-like apothecia grow at the ap

21-09-2020 08:57

Castillo Joseba Castillo Joseba

De ayer en madera de FagusPelos hasta 1533µA ver

« < 1 2 3 4 5 > »
Small-spored Otidea
Juuso Äikäs, 16-09-2020 05:07
There was a group of small Otideas growing in a Picea abies dominated forest on needle debris. The biggest ones were about 2 cm high and they shot spores readily after slightly drying.

Spore measurements (spore print in water):


(10) 10.5 - 11.9 (14) × 6.2 - 6.9 (8.8) µm
Q = (1.5) 1.6 - 1.78 (1.8) ; N = 20
Me = 11.2 × 6.6 µm ; Qe = 1.7


Tips of paraphyses up to 6 µm wide.


I tried to figure out the species with the aid of the Otidea monograph but didn't come to any certain conclusion. My best guess is O. nannfeldtii and second one O. formicarum.


O. nannfeldtii apparently likes to grow on nutrient-rich, often calcareous soil. This place seemed to be acidic though, not nutritious.


O. formicarum typically grows on old ant hills but apparently can also grow on just needle debris. Maybe the dark warts on the outer surface speak against it? I haven't seen any pics or descriptions that include them for that species.


The last two microphotos are from a dried fruitbody in 3 % KOH.

  • message #65021
  • message #65021
  • message #65021
  • message #65021
  • message #65021
  • message #65021
  • message #65021
Viktorie Halasu, 17-09-2020 00:12
Viktorie Halasu
Re : Small-spored Otidea
Hello,

I think the ectal excipulum (cell walls) became yellow in KOH, did you consider O. tuomikoskii? In some collections, this reaction can disappear again in ca. 20 seconds, in others it stays. Also the intensity and placement of the yellow staining is variable. In nannfeldtii the surface exudates turn reddish brown, and it should have two-layered medulla (although I have a DNA-confirmed collection of nannfeldtii with 1-layered medulla too). 

Cheers,
Viktorie
Juuso Äikäs, 17-09-2020 14:55
Re : Small-spored Otidea
I returned to the place and now the biggest apo was 3.5 cm long. There was a yellow reaction with KOH (a slice under 100X magnification in the pic)! Also when I put a drop of KOH on the apo and put a paper on it, there was yellow pigment in it. 

Because of the small size and lack of noticing the yellowing, I didn't consider O. tuomikoskii but with this new info I think you are correct! The ecology would also fit better, this one is apparently much more common and less demanding of habitat that O. nannfeldtii.

Thank you.
  • message #65033