Fruticose lichen covered with ice after freezing rain.
Fruticose lichens are the most three-dimensional lichen type. They're usually round in cross section, and most are branched, looking like small shrubs. The lichens in the lower right are foliose. They are leaf-like and look something like foliage. Neither are harmed by ice nor freezing temperature, though dry conditions will cause them to go dormant.
Fruticose lichen with apothecia (fruiting bodies).
The same type of lichen a few inches up the branch are "blooming", producing fruiting bodies called apothecia. All lichens are an alga and fungus living in a symbiotic relationship. Most (but not all) of the fungi involved in producing lichens are Ascomycetes, which reproduce by growing a cup-like fruiting body called an apothecium. The apothecium's spores will only reproduce a fungus. To form a lichen it must combine with the appropriate algae.
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