Top 20 Most Common Mushrooms in Kiruna

Thalli are fruticose, and extensively branched, with each branch usually dividing into three or four (sometimes two); the thicker branches are typically 1–1.5 mm in diameter. The color is grayish, whitish or brownish grey. C. rangiferina forms extensive mats up to 10 cm tall. The branching is at a smaller angle than that of Cladonia portentosa. It lacks a well-defined cortex (a protective layer covering the thallus, analogous to the epidermis in plants), but rather, a loose layer of hyphae cover the photobionts. The photobiont associated with the reindeer lichen is Trebouxia irregularis. It grows on humus, or on soil over rock. It is mainly found in the taiga and the tundra.

Grey falsebolete thrives underneath Scots pine trees, growing in the needles and plant debris. Its large grey cap and white pores make it easily identifiable. The species is threatened in Europe and is on the shortlist for protection in the Berne Convention on the Conservation of European Wildlife and Natural Habitats.

The fungus has fruit bodies that range in form from crust-like to effused-reflexed (mostly crust-like, with edges curling out to form rudimentary caps). Individual fruit bodies measure up to 15 cm (6 in) wide, and have a dirty whitish to light buff surface colour that becomes reddish brown when dry or if bruised. Amylocystis lapponica has a monomitic hyphal system, containing only generative hyphae. These hyphae are mostly thick-walled and measure 4–10.5 µm thick. The spores are cylindrical, hyaline, and smooth, measuring 8–11 by 2.5–3.5 µm. They are unreactive in Melzer's reagent. Oligoporus fragilis is similar in appearance, but can be distinguished microscopically from Amylocystis lapponica by the lack of amyloid cystidia.