Flavocetraria cucullata (Bellardi) Kärnefelt & A. Thell

Nomenclatural data
Acta Bot. Fenn. 150: 81, 1994. – Lichen cucullatus Bellardi, Osservaz. Bot.: 54, 1788. – Type: TO. – Platysma cucullatum (Bellardi) Hoffm., Descr. Adumbr. Plant. Lich. 3: 17, 1801. – Cetraria cucullata (Bellardi) Ach., Meth. Lich.: 293, 1803. – Parmelia cucullata Spreng., Syst. Veget. 4(1): 281, 1827. – Allocetraria cucullata (Bellardi) Randlane & Saag, Mycotaxon 44: 492, 1992.
Morphology
Description – see Kärnefelt et al. 1994.
Typical characters. Thallus erect, dorsiventral, yellow on both surfaces with reddish basal parts. Lobes strongly canaliculate or subtubular.
Chemistry
Contains usnic acid in the cortex; lichesterinic and protolichesterinic acids in the medulla. Several anthraquinone pigments are present in the basal parts of the thallus, in both the cortex and medulla.
Remarks
Two well-known yellow species – F. cucullata and F. nivalis – were recently transferred from Cetraria to a newly described genus Flavocetraria on the grounds of anatomical characters (shape of pycnoconidia, structure of upper cortex) and cortical chemistry (Kärnefelt et al. 1994). F. cucullata is usually easily recognized by its typical canaliculate or subtubular lobes.
Ecology and distribution
Widely distributed in arctic and boreal regions of the northern hemisphere; also occurs in cold temperate areas of southernmost South America (Kärnefelt et al. 1994). In Asia it is known from China [Neimongol, Xizang and Yunnan provinces (Wei 1991)], India (Awasthi 1983), Japan (Yoshimura 1979; Kurokawa 1991), Mongolia (Golubkova 1981), Nepal (Kurokawa 1993) and Russia (Rassadina 1950). We have not examined any herbarium specimens of A. cucullata from Tibet but its occurrence there has been recorded in literature (Wei 1991). Grows on ground among mosses and other lichens in tundra or alpine vegetation.
Species pages available
cucullata | nivalis
Literature
Kärnefelt, I., Thell, A., Randlane, T. & Saag, A. 1994. | Randlane, T., Saag, A. & Obermayer, W. 2001.
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