Description
Thalli are fructicose, 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.
Read more about this topic: Cladonia Rangiferina
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