SOME SPECIES OF CLADONIA, PUBLISHED BY J. D. Hooker & T. Taylor FROM THE SOUTHERN HEMISPHERE by TEUVO AHTI ,* SOILI STENROOS* & Alan W. ARCHERt ABSTRACT Ahti, Teuvo, Soili Stenroos & Alan W. Archer. Some species of Cladonia, published by J. D. Hooker & T. Taylor from the Southern Hemisphere. Muelleria 7(2): 173-177 (1990). — The taxonomy and nomenclature of some taxa of Cladonia (Lecanorales, lichen-forming ascomycetes) from the Southern Hemisphere are discussed. Cladonia decurva Taylor ex Church. Bab. & Mitten in J. D. Hooker ( nom. inval.) is to be replaced by C. scabriuscula (Delise in Duby) Nyl., C. squamosula Mull. Arg. var. squamosula by C. rigida (J. D. Hooker & Taylor) Hampe var. rigida, C. squamosula var. subsquamosula A. W. Archer by C. rigida var. acuta (Taylor) A. W. Archer, C. campbelliana (Vainio) Gyelnik by C. sarmentosa (J. D. Hooker & Taylor) Dodge and C. flavescens Vainio by C. ustulatai J. D. Hooker & Taylor) Leighton. C. phyllophora (J. D. Hooker & Taylor) Dodge (nom. illeg.) probably represents an unnamed species close to C. corniculata Ahti & Kashiw. A new combination is C. rigida var. acuta (Taylor) A. W. Archer. A lectotype is selected for C. sarmentosa (J. D. Hooker & Taylor) Leighton. The major phenolic compounds of each taxon are presented. INTRODUCTION The following six species of Cladonia were published in the 19th century by J. D. Hooker and T. Taylor from the Southern Hemisphere (Hooker & Taylor, 1844; Hooker, 1847, 1860): Cladonia decurva Taylor ex Church. Bab. & Mitten, Cenomyce acuta Taylor, C. phyllophora J. D. Hooker & Taylor, C. rigida J. D. Hooker & Taylor, C. sarmentosa J. D. Hooker & Taylor and C. ustulata J. D. Hooker & Taylor. These species have been restudied by some authors, especially Vainio (1887, 1894), Muller Argoviensis (1888) and Dodge (1948), but the status of most of them has remained uncertain. A careful study of the original specimens turned out to lead to a number of taxonomical and nomenclatural changes, presented below. The phenolic products of the type material were analyzed by thin-layer chromatography (TLC; see Culberson 1972; White & James 1985). TAXONOMY AND NOMENCLATURE 1. Cladonia decurva Taylor ex Church. Bab. & Mitten in J. D. Hooker, FI. Tasm. 2: 350 (1860); pro syn. Orig. Coll.: Australia. Tasmania (“Van Diemens Land”; BM\ fide Filson 1986). C. decurva was listed under C. squamosa by Babington and Mitten (1860) as a herbarium name given by Taylor to specimens in Hooker s collection. A brief description was also given, which was later repeated by Vainio (1887, p. 429) in Latin. However, C. decurx’a was not definitely accepted by the authors of these publications, and therefore the name was not validly published. The species was not referred to by Leighton ( 1 867) in his list of specimens from the Hooker Herbarium which were tested with potassium hydroxide, and C. decurva was not listed by Wilson (1892) although other references were made to the Flora Tasmaniae. The species *DepartmentofBotany,UniversityofHelsinki,Unioninkatu44,SF-00170Helsinki,Finland, t Division of Analytical Laboratories, P.O. Box 162, Lidcombe, New South Wales, Australia, 2141 173