Observation 265673: Lycogala terrestre Fr.

Notes:
Code: Bot_1030/2016_IMG1723

Habitat: Open wood, Picea abies and Fagus sylvatica dominant trees; steep mountain slope; southeast aspect; calcareous ground; rather dry place, in half shade; exposed to direct rain; temperatures during last few days from -5 to 5 deg C; average precipitation ~ 3.000 mm/year, average temperature 4-6 deg C, elevation 1.165 m (3.800 feet), alpine phytogeographical region.

Substratum: rotten stump of a large Picea abies overgrown with mosses.

Place: Vrsnik valley, above the settlement Na skali, East Julian Alps, Posočje, Slovenia EU.

Comment: Distinctly pink spore mass of mature aethalia and flexible pseudocapillitium threads distinguish this find from Lycogala epidendrum (L.) Fries (gray spore mass and fragile threads) and determine it as Lycogala terrestre Fries. (Ref.: 1 and 5). However, not all authors recognize both taxa. Some consider Lycogala terrestre as variety of Lycogala epidendrum, some synonimyze them (Ref.4). What surprises with this find is unusual surface of spores. Almost all sources state minutely reticulated spores for both Lycogala epidendrum and Lycogala terrestre, while the spores observed show quite coarse reticulation. Also aethalia show both, almost smooth, minutely spinulose, as well as coarsely, transversally wrinkled surface of pseudocapillitium threads.

About 12-13 aethalia found. Average diameter 6.7 mm, SD = 1.7 mm (min = 3.5 mm, max = 9.2 mm). Peridium thin but strong, flexible. Pseudocapillitium threads flexible.

Nikon D700/Nikkor Micro 105mm/f2.8 and Canon G11, 6.1-30mm/f2.8-4.5

Species Lists

Images

Pink spore mass of mature aethalium with abundant pseudocapillitium threads.
Coarsely transversally wrinkled surface of pseudocapillitium threads.
Pseudocapillitium threads are flexible and can be bent without breaking.
Pseudocapillitium threads can be up to about 20 microns wide.
Almost smooth, minutely spinulose surface of pseudocapillitium threads.
Club shaped free ends of pseudocapillitium.
Club shaped free ends of pseudocapillitium.
Coarsely reticulated spores.

Proposed Names

57% (1)
Recognized by sight: Pink spore mass.
Used references: (1) B. Ing, The Myxomycetes of Britain and Ireland,The Richmond Publ. Co.Ltd, (1999), p 92.
(3) M. Poulain, M. Meyer, J. Borronet, Les Myxomycetes, FMBDS (2011), Vol.1., p 321.
(4) C. Lado, Nomenmyx : a nomenclatural taxa base of myxomycetes (2001), CSIC, Madrid.
(5) http://www.wildaboutbritain.co.uk/...
(6) T. Macbride, G.W. Martin, The Myxomycetes; a descriptive list of the known species with special reference to those occurring in North America (1934), The Macmillan Company, New York, p 244.
Based on microscopic features: Spores minutely warty, globose to subglobose. Dimensions: 6,5 [6,9 ; 7] 7,5 × 6,3 [6,7 ; 6,8] 7,2 microns; Q = 1 [1,0] 1,1; N = 42; C = 95%; Me = 7 × 6,7 microns; Qe = 1. Olympus CH20, NEA 100x/1.25, magnification 1.000 x, oil (spores), NEA 40x/0.65, magnification 400x (all other pictures), in water, fresh material. AmScope MA500 digital camera.

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