date of photo Jul 6, 2016
latitude 46.36002 longitude 13.70436
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location
Lower Trenta valley, between villages Soča and Trenta, right bank of river Soča, next to Trenta 2, Skokar (abandoned) farm house, East Julian Alps (Posočje, Slovenia)notes Slo.: no name. - syn.: Stemonitis splendens Moreno - Habitat: grassy yard of a farmhouse, open place; almost flat terrain, calcareous, skeletal ground; partly in shade; partly protected from direct rain by the trough, average precipitation ~ 3.000 mm/year, average temperature 7-9 deg C, elevation 570 m (1.870 feet), alpine phytogeographical region. Substratum: eleven years old, handmade wooden water trough (Larix decidua wood), standing on four thin wooden legs; wood still (almost) intact, the trough still capable to hold water. Comment: Spore dimensions and type of surface, size and color of the sporocarps, small meshed, persistent peridial net, sparsely branched internal capillitium with extensions, wavy columella toward its end, columella reaching the apex of the sporocarps, as well as habitus and substratum fit well to the description of Stemonitis lignicola in the literature. Sporocarps 8.2-8.5 mm high, stalks 2- 2.1 mm long. Spore print abundant, dark brown. What I am curious is, did the whole development process of this myxomicete from start to the end take place on the water trough (which is most of the time dry and standing in free air), or did this thing really climb up one of the thin trough's legs in the form of plasmodium before building sporocarps? Spores evenly, densely and minutely warty (verruculose); globose to subglobose. Dimensions: 6,8 [7,2; 7,4] 7,8 x 6 [6,6 ; 6,8] 7,3 microns; Q = 1 [1,1] 1,2; N = 40; C = 95%; Me = 7,3 x 6,7 microns; Qe = 1,1. Taken from dried material by gently tapping sporocarps. Outer net (peridium) mesh dimensions: 7.5 [19.3 ; 23.2] 35 x 7 [15.3 ; 18] 26.3 microns; Q = 0.8 [1.2 ; 1.4] 1.8; N = 50; C = 95%; Me = 21.2 x 16.7 microns; Qe = 1.3. The largest meshes haven't been taken into account; assuming they are the consequence of damages during microscopy. Olympus CH20, NEA 100x/1.25, magnification 1.000 x, oil (spores), in water; NEA 40x/0.65, magnification 400x (capillitium extensions), NEA 10x/0.25, magnification 100x (stalk); Bausch & Lomb, 4x/0.10, magnification 40x (peridium, capillitium), in air without cover glass. AmScope MA500 digital camera. Herbarium: Mycotheca and lichen herbarium (LJU-Li) of Slovenian Forestry Institute, Večna pot 2, Ljubljana, Index Herbariorum LJF Ref.: (1) B. Ing, The Myxomycetes of Britain and Ireland,The Richmond Publ. Co.Ltd, (1999), p 203. (2) M. Poulain, M. Meyer, J. Borronet, Les Myxomycetes, FMBDS (2011), Vol.1., p 541. (3) M. Poulain, M. Meyer, J. Borronet, Les Myxomycetes, FMBDS (2011), Vol.2., p 538. (4) Personal communication with Mr. Marko Sovre, owner of the water trough, who showed me the find.camera Nikon D700/Nikkor Micro 105mm/f2.8
contributor's ID # Bot_984/2016_DSC3464 photo category: Fungi - mold
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