A revision of the New Zealand, Subantarctic, and South American species of Cotula, Section Leptinella

Abstract

The taxonomic position, status, and characters of Cotula, and its subdivision into three sections are briefly described. Section Leptinella is considered a well-defined taxon and its characters and relationships are discussed. Twenty-five species from New Zealand, the Subantarctic islands, and South America are described and classified into two series, Elongata and Radiata. The following new taxa and names are described: series Oligoleima (from Australia and New Guinea), Elongata and Radiata; five new species, C. dispersa, C. serrulata, C. calcarea, C. intermedia, and C. nana; two new names, C. albida and C. membranacea; five new combinations, C. rotundata, C. traillii subsp. pulchella, C. pectinata subsp. villosa, C. pectinata subsp. willcoxii, and C. pyrethrifolia var. linearifolia; four new subspecies, C. dispersa subsp. rupestris, C. dioica subsp. monoica, C. squalida subsp. mediana, and C. atrata subsp. luteola.