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Malcolm Greaves
This pair of ascos 2.5cm across were on recently b
Hymenoscyphus ?
Nicolas VAN VOOREN,
10-09-2014 19:37
Trouvé en zone alpine, un minuscule Helotiales brunâtre, stipité, d'environ 2/10 mm, que je ne parviens pas à identifier. Ses caractères micros m'on fait chercher dans le genre Hymenoscyphus, mais je ne trouve rien qui colle...Les apothécies poussaient sur la face infère de petites feuilles pourrissantes (peut-être de Salix reticulata).
Asques de 85-97 µm de long, avec crochet, IKI + (bb), anneau apical de type Hymenoscyphus
Paraphyses contenant un pigment vacuolaire brunâtre
Spores ± fusoïdes ou en forme de semelle, 17-24.5 × 4.5-5.5 µm, contenant de nombreuses guttules polaires (cf. dessin)
Excipulum de textura primastica
===
Apothecia were growing on decaying small leafs (lower face), maybe of Salix reticulata.
Asci 85-97 µm in length, with crozier, IKI+ (bb), apical ring of Hymenocyphus-type
Paraphyses containing a brownish vacuolar pigment
Spores ± fusoid or shoe-shaped, 17-24.5 × 4.5-5.5 µm, with numerous lipid bodies at the poles (see drawing)
Excipulum of textura prismatica
Une piste ? Any idea?
Hans-Otto Baral,
10-09-2014 20:59
Re : Hymenoscyphus ?
It is difficult without photos. Are the spores sometimes slightly scutuloid? The brownish vacuoles, are they refractive or not? I do not understand the stipe size, 10 mm long and 2 mm thick? You say minuscule, but with such a thick stipe it should be a large fungus.
Zotto
Zotto
Nicolas VAN VOOREN,
11-09-2014 08:22
Re : Hymenoscyphus ?
Sorry Zotto, I forgot to translate the first part of my short description.
In fact ~0.2 mm is the diameter of the apothecia, I didn't measure the stipe. At first sight, the specimens were looking more like a small member of the Sclerotiniaceae...
The vacuoles inside paraphyses were not refractive and I didn't see any spores with a scutuloid shape.
In fact ~0.2 mm is the diameter of the apothecia, I didn't measure the stipe. At first sight, the specimens were looking more like a small member of the Sclerotiniaceae...
The vacuoles inside paraphyses were not refractive and I didn't see any spores with a scutuloid shape.
Hans-Otto Baral,
11-09-2014 12:23
Re : Hymenoscyphus ?
ah, 2/10 mm diam. :-)
So it should be a Hymenoscyphus indeed. Would be good to know whether the stipe is much longer than broad, or ....
In any case, with only spores figured it will be a pity for this probably interesting species.
Zoto
So it should be a Hymenoscyphus indeed. Would be good to know whether the stipe is much longer than broad, or ....
In any case, with only spores figured it will be a pity for this probably interesting species.
Zoto