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Collema conglomeratum new to Fennoscandia REIDARHAUGAN During studies of the lichen flora in oldgrowth forests in southeastern Nonvay, a locality in Hole municipality, some 25 km NW of <strong>Oslo</strong> was visited. The investigation revealed a locality of Collema conglomeratum. The site was first investigated in April 1995 and revisited in May to clariff the status of the population. The species Haugan, R. L995: Collema conglomeratum new to Fennoscandia. Graphis Scipta 7: 94-96. Stockholm. ISSN 0901 -7593. The macrolichen Collema conglomeratum is reported as new to Fennoscandia. It was found epiphytic on trunks of Acer platanoid,es and Fraxinus excelsior in an old, thermophilous deciduous forest in Buskerud county, southeastern Nonray. Some comments on the tru
GRAPHTS SCRTPTA 7 (rees) Isles this century (Purvis & James L992), and it is endangered and partly extinct in Germany and Switzerland (Clerc et al. L992, Wirth lees). Ecology The site is a narrow, wooded zone above a steep, W-facing and treeless scree, at the base of 10-50 m high vertical cliffs, about 400 m above sea level. The investigated locality is about 1 km in extension, and the forest is dominated by a mixture of old thermophilous deciduous trees, such as Acer platanoi^d.es, Fracinus excelsior, Tilia cordata, and Ulmus glabra, and some scattered groups of the conifers Picea abies, Pinus sylvestris, and Taxus baccata. Collema conglomeratum was observed on four trees only, scattered in the locality. The species was growing in small colonies in bark fissures of old, rather sun-exposed trunks of Acer platanoides and Frarinus excelsior from the base to about two meters above the ground, always on the southern side of the tree. It was abundant and partly dominating on one trunk of Fracinus excelsior, more sparse at the other stems. Most of the observed specimens grew directly on bark, but some specimens also grew among mosses. The most frequently associated species was Acrocordia gemmata. Other species included Collema flacci^duffi, C. nigrescens, Lecanora allophana, Lecid.ella elaeochroma ) Leptogium s aturninum, Mycobilimbia sabuletotuffi, Peltigera collina, and Sclerophora nivea, together with the bryophytes Frullania dilatata, Leucodon sciuroi"des, and Homalothecium seiceum. Collema conglomeratum in Fennoscandia 95 belt and a rather high precipitation at this elevation which is probably of great ecological significance for the lichens. Elsewhere in Europe, the species occurs exclusively on bark of deciduous trees, especially in rather open situations along roads, in gardens, and other habitats influenced by man. It shows a preference for bark fissures and often grows together with other species of the Collemataceae (Degelius 1954). In the British Isles, it is known from bark of Ulmus and Fraxinu,r, especially in waysides, and nutrientenriched places (Purvis & James L992). In southern Germany, C. conglomeratum grows mainly on large, solitary deciduous trees in areas with mild winters. It is there regarded as a neutrophilous, somewhat photophilous, mesophilous, and relatively nitrophilous species (Wirth 1995). In Italy, it is a species of eutrophic bark, mostly occurring in Xanthorion communities (Nimis L993). The Nonvegian locality is rather similar to these descriptions, except for the rather natural situation with a limited nutrient supply. Specimen ex,amined: Norway. Buskerud: Hole, W facing scree SW of T6mmer6sen, 400 m, 60'01'N, 10o16'E, UTMED5g: NM 7L2 546-552 (map 1815 III), Gaarder, Haugan & Midteng H4108 (O). Acknowledgements The locality contains several oceanic lichens which are rare in southeastern References I wish to thank Geir Gaarder, Arnodd H8pnes and Rein Midteng for company in the field, and Harald Bratli and Rune @kland who helped me with the identification of the bryophytes. Norway, e.g. Collema nigrescens, Degelia .-1 ptumbia uler-c' (soiretimes with thi parasiie P" scheidegger, roina c' & Amman, K' 1992' ptu UUa), Lobaria atnplissima, and pannaria iste louge des macrolichens de la Suisse. -conoplea.'These lichens may indicate a long n *'' Helv' 102:71-83' ecological continuity segelius' of the forest because of G' 1954' The lichen genus Collema their suspected vd;erability toygrds. ro.'.'try o"r3*"I8Ti activities. By the exposition and ;if,,i:,;"y{::t;!l;3,t;,i3" insolation of the locality on" *o.rld with special reference expect a rather xero- to the extra-europhilous pean species' lichen flora, but there Symb' is a regular fog Bot' Upsal 20, 2: L- 2r5.
Page 1 and 2: GRAPHIS SCNIPTA Volym 7, hafte 2, 1
Page 3 and 4: Slektet Lepraria i Skfine LOUISE LI
Page 5 and 6: GRAPHTS SCRTPTA 7 (Lees) Lepraria i
Page 7 and 8: GRAPHTS SCRTPTA 7 (Lges) o @ h {D (
Page 9 and 10: GRAPHTS SCRTPTA 7 (Lees) Namnet L.
Page 11 and 12: GRAPHTS SCRTPTA 7 (rees) inte siill
Page 13 and 14: GRAPHTS SCRTPTA 7 (199s) Kollekter:
Page 15 and 16: Cladonia incrassata new to Nonuay,
Page 17 and 18: GRAPHTS SCRTPTA 7 (re95) blunt, wit
Page 19 and 20: GRAPHIS SCRTPTA 7 (r99s) European m
Page 21 and 22: Notes on the lichens of the Pechoro
Page 23 and 24: GRAPHTS SCRIPTA 7 (regs) Bryoia fur
Page 25 and 26: GRAPHTS SCRIPTA 7 (r99s) **Cladonia
Page 27 and 28: GRAPHTS SCRIPTA 7 (regs) Populus tr
Page 29 and 30: GRAPHIS SCzuPTA 7 (r99s) habitats,
Page 31 and 32: GRAPHTS SCRTPTA 7 (r99s) Chaenothec
Page 33 and 34: Erioderma pedicellatum still presen
Page 35 and 36: GRAPHIS SCRIPTA 7 (1995) Erioderma
Page 37 and 38: GRAPHIS SCRIPTA 7 (r99s) another li
Page 39 and 40: Fellhanera subtilis found in Finlan
Page 41 and 42: Floristic notes from SW Denmark STE
Page 43: GRAPHTS SCRIPTA 7 (1995) Phaeopryxi
Page 46 and 47: 9?, Enk Larsen GRAPHTS SCRTPTA 7 (L
Page 50 and 51: 96 Reidar Haugan Nimis, L. 1993. Th
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