Myco Monday: False Tinder Conk

False Tinder Conk pokes its nose through a Sunburst of Lichens

This picture shows the trunk of a living aspen (Populus tremuloides) hosting a diversity of ectocommensal Sunburst Lichens and a heart rot.

Xanthomendoza cf fallax

The lichens are members of the genera Xanthoria and/or Xanthomendoza - the latter recently removed from the former - and get their name for an obvious reason. The endoparasitic heart-rot fungus (Phellinus tremulae) is only showing its 'nose' or conk - a woody structure composed of an array of downward pointing tubes that release spores and an upper 'crust'. Presumably the False Tinder Conk is no good for making tinder, but it does make aspen poor neighbours - likely to break and fall on your head in a strong wind.


In Australia, whenever I asked about a 'conk', people would look at me like I'd just kicked a bucket. Apparently, its use for the fruiting bodies of woody polypores is a strictly North American thing. 'Conk' also is slang for a nose or sounds similar to a 'punch on the nose', but derives from  the Greek for a mussel shell (and our word 'conch'). Conks do bear a vague resemblance to both a nose and a mussel shell, and if one of these infested trees broke and landed on your head, the least of your worries would be being conked out.

Myco Monday: Cladonia diversity in minature

Six species of Cladonia reindeer lichen

This image is of a small clump of reindeer lichens (Cladonia spp.) on a log in an open spot of aspen parkland. We thought there were several kinds of lichens, but when we showed the picture to a specialist, she recognized 6 tentative species (chemical tests are needed to be certain):
Cladonia gracilis ssp turbinata – smooth cupped, no soredia, brown tips (apothecia and pycnidia), little squamules (leaf-like structures) coming off of stalks
Cladonia botrytes – pale brown apothecia, upper right hand corner
Cladonia mitis – branching species, (subgenus Cladina)

Cladonia cristalla or bellidiflora – smooth  slightly branched specimen with red apothecia

Cladonia crispata var crispata – upper right hand corner by botrytes with wide open cup, can see directly down into podetium/stalk

Cladonia coniocraea – sorediate unbranched podetia in lower part of picture

That's quite a bit of diversity for a few square centimetres of forest floor.