Collection location: Forest near Elgin St., Pembroke, Ontario, Canada [Click for map]
There were a few of these growing in moss in Zone 43.
Zone 43 resembles Zone 15: open space close by, moss, reindeer lichen (Cladina spp.), and jack pine. As such it contains Suillus granulatus. The interesting thing is that it also contains Cantharellula umbonata, which grows abundantly with the same moss in Zones 19 and 39 but not very often in 15. It likes the presence of something Zone 15 lacks, it seems.
What 15 has is jack pine, quaking aspen, the moss and lichens, and also Cladonia spp. and occasional other pine species close by. 19 has a few oak sprouts and the occasional maple. 39 has maple. I’m wondering if maple is needed, or oak, or some other hardwood Zone 15 lacks? (Not birch. 19 lacks birch and has C. umbonata aplenty.) Or it could be some odd thing to do with soil chemistry, or maybe 15 just never got colonized by Cantharellula spores.
Alternatively, perhaps 15 has something that inhibits C. umbonata. The Cladonia lichens aren’t it, though, as 19 has them, and the Cladina lichens likewise, as 19 and 43 have them. Aspen could be the culprit though.
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