This superficial, globose, finely craked, blackish-brown stromata, 10 mm high 15 mm broad is narrowly attached on bark of Acacia melanoxylon together with stromata of Daldinia sp., Jumillera cinerea and Nemania aureolutea.

The small monostichous perithecia are more or less globose, 0.6-0.8 x 0.5-0.7 mm, with a roundish conspicuous papilla

KOH-extractable pigments brightly greenish. Asci long stipitate 225-262 x 9-10, pars sporifera 142-160, 8-sspored, with a conspicuous hat shaped apical apparatus deeply blue in Mlz. and IKI, longer than broad. Ascospores olive brownish, 21-27 x 7-8.5, with a germ-slit shorter spore lenght on the less convex side. Perispore indehiscent in KOH.

Could be a penzigioid Xylaria species? Are normal the existence of KOH-extractable pigments for these fungi?

Thanks again

Jacques Fournier, 13-08-2015 14:48

Re : Xylariaceous fungus on Acacia melanoxylon

Hola Enrique,
this is indeed a nice penzigioid Xylaria matching no known species in the literature. You are right, the greenish pigments in KOH are rarely encountered in this genus, they are just known from tropical taxa like X. telfairii or X. olobapha and relatives. Moreover the reddish brown coating and the ascospore morphology set it apart from species with similar stromata.
Xylariaceae are often endophytic and they likely travelled with their host from Australia and like your Daldinia represent extra-European species.
I suggest you send the Xylaria to Yu-Ming Ju in Taiwan who is very interested in penzigioid taxa and who will cultivate it. If the material is plentiful, I would be happy to have some stromata too...
Saludos,
Jacques

Enrique Rubio, 13-08-2015 14:56

Re : Xylariaceous fungus on Acacia melanoxylon

Hi Jacques

Allways your magical help!

I can send you the only one stromata that I have found. Do you want it? The Daldinia species on Acacia m. with greenish pigments will be sent to Marc Stadler for to study it.

Thanks again

Jacques Fournier, 13-08-2015 14:58

Re : Xylariaceous fungus on Acacia melanoxylon

I would like to be more helpful!
Yes, send it over, I will forward it to Yu-Ming.
Jacques

Enrique Rubio, 13-08-2015 17:03

Re : Xylariaceous fungus on Acacia melanoxylon

I'll send you it,Jacques . And many thanks again