04-04-2018 16:05
Ethan CrensonHello all,From Bronx NYC, Pelham Bay Park on Picea
04-04-2018 10:56
Per Marstad
Very small, ca. o,5 mm, with hair, growing on Pinu
23-03-2018 17:25
Herrera Emerson
Me encontre con este hongo en Teca, no causa daño
03-04-2018 23:19
Chris Yeates
Bonsoir tousa dematiaceous hyphomycete has appeare
31-03-2018 17:46
Juuso ÄikäsThese things seem to be quite common over here on
02-04-2018 11:22
Per Marstad
Small fungus growing on Fraxinus.Spores 60-75 x 5
29-03-2018 23:27
Juuso ÄikäsHopefully this is an appropriate post. I'm quite a
31-03-2018 23:07
Elisabeth StöckliBonsoir, Trouvé sur branches mortes de Berberis
Hysterium pulicare (?)
Ethan Crenson,
04-04-2018 16:05
From Bronx NYC, Pelham Bay Park on Picea. Am I correct that this is Hysterium pulicare? Ascospores are brown, 3-septate, (18) 21-24 by 6-8µm. The end cells of most spores are lighter brown (a few almost hyaline) than the median cells.
The difference between H. angustatum and H. pulicare in Boehm's key depends on this feature: "terminal cell mainly remaining hyaline". He also writes that ~10% of ascospores of H. pulicare are typically found to be concolorous; and ~5% of ascospores of H. angustatum are found to be versicolorous.
Ascospore size for H. pulicare is worth mentioning as well. H. pulicare ascospores can reach up to 40µm in length according to Boehm and Zogg. I did not observe anything approaching 40µm.
So my questions regarding my collections boil down to: Are the end cells light enough to place it in H. pulicare? Does the absence of ascospores in the larger range (near 40µm) eliminate H. pulicare as a possibility?
Thanks in advance!
