29-04-2024 21:32
Robin IsakssonHi! Found in Sweden. Ascomata with haris, se
30-04-2024 19:43
Gernot FriebesHi!We observed this hyphomycete growing between le
30-04-2024 16:22
François BartholomeeusenDear forum members,On April 25 2024, I found one f
29-04-2024 21:51
Mathias HassHi everyone, Found on attached branches of top pa
28-04-2024 18:05
Bernard CLESSEBonsoir à toutes et tous,J'ai trouvé ce matin ce
24-03-2024 08:27
Thierry BlondelleHiOn Hedera helix fallen branchEcological habitat:
26-04-2024 10:07
Mathias HassHello, Does anyone know what this is? Found on J
Apothecia first pustulate, then expanding to cupulate, disc-shaped with wavy margins, thick, up to 4 mm in diam, single or in clusters, emerged through the epidermis; outer surface velvety, brown, in young edge comes to disc surface, in older vanishes under concave hymenium surface, disc surface from greenish, olive, to light brown and yellowish gray.
Excipulum from several layers, medullary from textura prismatica-intricata, hyphae about 4 mk broad, walls thickened, not gelatinose, in receptacle with brown exudates; hyphae from medullary layer radially arranged and form dense layer at outer surface; e.g. cells enlarged, globose, brown, (7-10 mk); hairs (to 40 mk long) cover all outer surface, from 3-5 globose cells at base and elongated end cell, clavate or cylindrical (25 x 5-8 mk), wider at flanks and narrower at margin, with oil content, which colored blue in TB; asci cylindrical, without clamp, pore euamyloid, 99-112 x 6-7,5; paraphyses cylidrical, segmented, branched, largest exceeding the asci, with oil content which colored blue in TB; spores narrow-fusoid or subfusoid, 18 (16-19) x 2,2 (2-2,4) (Q=8,23; N=15).
Growing on bases of stems of Carex rostrata (wet, decaying leaves) in bog.
the presense of VBs in paraphyses/hairs excludes a Dennisiodiscus. lacking croziers and such spores remind me of Mollisia retincola, a species with a distinct yellow KOH-reaction adn particularly with abundant crystals in the medulla. I am not sure if you have any crystals there?
But the apos are extraordinarily large!
Zotto
The crystals present, they are in clusters and when the mount tapped they appear in abundance. I looked at your specimens of M. retincola. The habitat looks the same. But Mollisia is superficial and sited at subiculum. This specimen emergent, e.g. there is clear hole in the epidermis when the frb scraped from it. It is seen at picture of section (dark patch of leaf epidermis at base, and central part of frb going into the leaf).
I also had not described green content (oil) of paraphyses, this may be important. It is clear seen only in apos with green hymenium. Oil is colored blue in TB. And KOH dissolves all oil content (have not seen change to yellow, but it is dead stuff).
I have a folder "subretincola KOH-" which means that this is a species complex. Typical M. retincola I only know from Phragmites, whereas this one with KOH- is on Cyperaceae, so probably a different species with a deviating ecology.
VBs are recognized by their turquoise stain in CRB, oil drops do not stain. So I think your spore photo shows no clear blue of the drops, more a general colour effect.
I was following the dissolving of VBs in paraphyses now to be sure there is no change in color; and no, it has not showed up.
Oil in spores, of course, not blueing - now i hope i have learned this. Thanks for your instructions!