Observation 45263: Fomitopsis pinicola (Sw.) P. Karst.
When: 2010-04-15
No herbarium specimen

Notes: The fruitbody ‘clump’ of this specimen has grown in four phases. Based on the plane of the oldest pileus (gray upper surface, see picture 85332(1)) and the direction of the trunk one can conclude that it first appeared on a still standing tree, may me standing directly on river bank. It was already tilted for about 25 deg off vertical. The cap was on the trunk’s lower side. The tree was eventually downed by a high water and deposited in a tilted position of about 40 deg off horizontal plane. This was in such a way that this time the pileus was situated on the upper side of the trunk and that the pores of the original pileus were directed approximately horizontally (2). New caps started to grow from the upper side of the original cap. Next high water repositioned the trunk again and deposited it in an almost horizontal position (about 10 deg off horizontal plane). Again new caps started to grow from one side of the previous caps (3). A new high water deposited the trunk on another location. Again the trunk was lying nearly horizontally on ground, but it was axially rotated for about 45 deg. New (the smallest) caps started to grow again (4).

Lat.: 46.32156 Long.: 13.52209
Code: Bot_412/2010-1902

Habitat: Very young mixed forest, flooding area on the right bank of river Soča, poorly overgrown fresh alluvial calcareous deposits, average precipitations ~3.000 mm/year, half shade, humid place, average temperature 7-9 deg C, elevation 350 m (1.150 feet), alpine phytogeographical region.

Substratum: dead, broad leaved tree trunk (not conifer!) deposited by high water.

Place: Bovec basin, right bank of river Soča, near Podklopca settlement, East Julian Alps, Posočje, Slovenia EC

Nikon D700 / Nikkor Micro 105mm/f2.8 and AF-S Nikkor 18-70mm/f3.5-4.5 G-ED


Position of the pileus during each of four growing phase.
The oldest caps (gray ones).
The upper side of the oldest cup (first phase).
Second growing phase pileus growing out of the upper side of the first phase pileus.
Upper side of the cap of the third growing phase.
Upper surface of the pileus of the third phase.
This was once a tube layer surface of the third phase pileus, which has been overgrown with a tight resinous layer after positioning of the trunk in a new position.
The fourth phase pileus (the youngest).
Pore surface of the youngest pileus.
A cross-section of pileus clump showing three different directions of tubes.
This was once a pores surface of an almost totally resupinated pileus growing on the lower side of the trunk once the trunk was lying horizontally to the first time. After trunk’s axial rotation the pores were completely overgrown by a resinous layer.

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Created: 2010-05-10 12:05:02 CDT (-0400)
Last modified: 2015-03-02 19:25:17 CST (-0500)
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