1. Hypoxylon multiforme on decaying wood
2. Cordyceps myrmecophila parasitic on carpenter ants
3. Cordyceps myrmecophila parasitic on carpenter ants, closer view
4. Gyromitra californica
A canopy-dwelling foliose lichen in old growth conifer forests in the coastal
mountains of the Pacific northwest USA. Cyanobacterial symbiont is
responsible for fixing nitrogen and is present in internal cephalodia.
Habitat/habit shot of a large thallus (about 1/2 metre long) along a branch
of a 200 year-old Douglas fir, 25 metres above the ground.
Cross section of thallus showing upper cortex, green algal layer, and
cyanobacterium (Nostoc sp.) in cephalodium (duller green below)
Russulaceous mycorrhiza on Tsuga heterophylla (western hemlock).
Mycorrhiza diameter is approximately 1/2 mm. This low magnification
view shows the mantel of hyphae surrounding the host root.
cross section, enlarged
This higher magnification shows the Hartig net surrounding
cortex cells, in one case being sections in "face view" in its
position between cells "in front" and "behind" the slide.
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