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05-12-2017 16:20

Ethan Crenson

In New York City on a branch of Sassafras. (Whalle

05-12-2017 17:17

Lothar Krieglsteiner Lothar Krieglsteiner

... only a few perithecia, obtained in the Nationa

05-12-2017 13:52

Lothar Krieglsteiner Lothar Krieglsteiner

... near Colle Essichie in Valle Maira, alpine sta

04-12-2017 22:54

Edmond POINTE Edmond POINTE

A l'attention de Jacques Fournier.Bonsoir Jacques,

05-12-2017 11:47

Gilles Corriol Gilles Corriol

J'ajoute cette hélotiale peu documentée au cas o

29-11-2017 17:18

Gilles Corriol Gilles Corriol

Bonjour à tous,Un avis sur cette Hyaloscyphaceae

04-12-2017 21:03

Castillo Joseba Castillo Joseba

Me mandan el material seco de GaliciaPienso en Hel

04-12-2017 18:22

Pintos Angel Pintos Angel

Hi, it seems that it is conidia of Triplosphaeria

03-12-2017 23:27

Rubén Martínez Gil Rubén Martínez Gil

Hola a todos. Subo unas fotos de un asco que hemo

04-12-2017 00:16

Patrice TANCHAUD

Bonsoir,récolte réalisée sur pin brûlé, conid

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Creosphaeria sassafras ?
Ethan Crenson, 05-12-2017 16:20
In New York City on a branch of Sassafras. (Whalleya microplaca was present on the same branch).  Black globose fruiting bodies erumpent through the bark, 1-2mm in diameter, some growing confluent, somewhat flattened at the apex, with the black pigment becoming lighter in a spot near the apex (ostiole?).  Mustard yellow-orange powdery material in between the perithecia.  Brown spores, ellipsoid to ellipsoid-cylindrical, 9.5-12 by 4µm.  Asci with amyloid apical ring, long stipitate, spore bearing part 52-74 by 5-7µm.  Is this Creosphaeria sassafras?  The spore measurements I took are larger than those in Ellis and Everhart (7-9 x 3µm).  Thank you in advance!
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Jacques Fournier, 05-12-2017 17:36
Jacques Fournier
Re : Creosphaeria sassafras ?
Hi Ethan, you are correct, I am not aware of anything else with similar characters. I have not seen material from the US but your measurements match well with mines from European collections.
Cheers,
Jacques
Ethan Crenson, 05-12-2017 17:45
Re : Creosphaeria sassafras ?
Thank you for your quick reply, Jacques. Shortly after I posted this, I read the page on your web site about Creosphaeria sassafras. It looks very much like my collection, except that the growth habit for my collection seems to consist of more individual stromata whereas the ones that you illustrated grow more confluent in longer stromata.  Can that be attributed to the differing host species?  Or is there another factor? 
Regards,
Ethan
Jacques Fournier, 05-12-2017 17:58
Jacques Fournier
Re : Creosphaeria sassafras ?
I have seen several additional collections since our first records, some of them much like what you illustrated. I think the structure of the bark and growth conditions are responsible for these differences in the habit of stromata. I remember a plentiful collection on branches of Laurus nobilis in which many types of configuration could be observed, depending on which side of the branch they grew.
Thanks for your nice finds!
Jacques