Tuhinga 16: 59–91 Copyright © Te Papa Museum of New Zealand (2005) The lichen genus Physcia (Schreb.) Michx (Physciaceae: Ascomycota) in New Zealand D. J. Galloway1 and R. Moberg 2 1 Landcare Research, New Zealand Ltd, Private Bag 1930, Dunedin, New Zealand (
[email protected]) 2 Botany Section (Fytoteket), Museum of Evolution, Evolutionary Biology Centre, Uppsala University, Norbyvägen 16, SE-752 36 Uppsala, Sweden ABSTRACT: Fourteen species of the lichen genus Physcia (Schreb.) Michx are recognised in the New Zealand mycobiota, viz: P. adscendens, P. albata, P. atrostriata, P. caesia, P. crispa, P. dubia, P. erumpens, P. integrata, P. jackii, P. nubila, P. poncinsii, P. tribacia, P. trib- acoides, and P. undulata. Descriptions of each taxon are given, together with a key and details of biogeography, chemistry, distribution, and ecology. Physcia tenuisecta Zahlbr., is synonymised with Hyperphyscia adglutinata, and Physcia stellaris auct. is deleted from the New Zealand mycobiota. Physcia atrostriata, P. dubia, P. integrata, and P. nubila are recorded from New Zealand for the first time. A list of excluded taxa is appended. KEYWORDS: lichens, New Zealand lichens, Physcia, atmospheric pollution, biogeography. Introduction genera with c. 860 species presently known (Kirk et al. 2001), and was recently emended to include taxa having: Species of Physcia (Schreb.) Michx, are foliose, lobate, Lecanora-type asci; a hyaline hypothecium; and ascospores loosely to closely appressed lichens, with a whitish, pale with distinct wall thickenings or of Rinodella-type (Helms greenish, green-grey to dark-grey upper surface (not dark- et al. 2003). Physcia is a widespread, cosmopolitan genus ening, or colour only little changed, when moistened).