Chromosome numbers in some species of Dicranoloma from Australia, New Zealand and Papua New Guinea

Abstract

Chromosome numbers have been added or confirmed for a number of Australasian species of Dicranoloma based on studies of New Zealand (and several Australian) collections. These are n = 7 for D. dicarpum, D. platycaulon, D. robustum; n = 8 for D. plurisetum; New Zealand populations of D. menziesii had n = 7 and lacked the m-chromosome found in Australian populations where n = 8 (7 + m). D. billarderii has n = 12 chromosomes. The chromosome number of n = 7 is confirmed for D. dicarpum in Papua New Guinea. The chromosome number of n = 9 (7 + 2 m) recorded for D. serratum in Ramsay (1985) is now referred to D. leichhardtii with which D. serratum has been synonymised (Klazenga 2003). © 2006 Royal Botanic Gardens and Domain Trust.