Research Note Chromosome Numbers in New Zealand Angiosperms

Transactions and Proceedings of the Royal Society of New Zealand, Volume 84, 1956-57, Page 936

Research Note Chromosome Numbers in New Zealand Angiosperms By J. A. Rattenbury Botany Department, Auckland University College. [Received by Editor, June 27, 1956.] Abstract Chromosome numbers, counted by the author, are listed for 46 species of Angiosperms, mostly indigenous to New Zealand. Included are a few related species from other parts of Polynesia and Melanesia. Introduction The following list of chromosome numbers is published in the hope that they will be of value to systematists. In very few cases has an exhaustive treatment been made of any one genus or family, and it is unlikely that these numbers would otherwise have been published for some time, if at all. Most specimens have been preserved either as herbarium sheets or exist as living plants in gardens or nurseries. Identification has been by the collector or the author. The arrangement of families follows that of Hutchinson, the numbers being his. Localities are given as accurately as known, but some specimens from public gardens have not been traced to their original sources. These last have been enclosed in brackets. The conventions used in recording the chromosome counts are as follows: For somatic tissues (mostly root-tips) the diploid number is given as (e.g) 2n = 24. For diakinesis or first meiotic metaphases, as (e.g.) 2n = 12n. For second meiotic division stages and pollen grain counts, the haploid number is given as (e.g.) n = 12. The author accepts full responsibility for the accuracy of the counts and will willingly make available any materials or further information he has in his possession. J. A. Rattenbury, Botany Department, Auckland University College. Auckland.

Name Locality Collector Number 48. Droseraceae Drosera spathulata Bainham, Nelson J. A. Rattenbury 2n = 20 81. Thymeliaceae Pimelia longifolia Henderson, North Auckland J. A. Rattenbury n = 18 P. urvilleana Waiheke Island, N. Auckland J. A. Rattenbury n = 18 87. Coriariaceae Coriaria arborea Long Bay, North Auckland J. A. Rattenbury 2n = c. 22II 88. Pittosporaceae Pittosporum tenuifolium var. purpureum (Horticultural variety) A. Farnell 2n = 24 P. colensoi Central North Island A. Farnell 2n = 24 P. divaricatum National Park, Wellington A. Farnell 2n = 24 P. ellipticum Piha, North Auckland A. Farnell 2n = 24 P. matthewsi North Auckland A. Farnell 2n = 24 P. umbellatum North Island A. Farnell 2n = 24 P. lineare National Park, Wellington A. Farnell 2n = 24 P. anomalum National Park, Wellington A. Farnell 2n = 24 128. Tiliaceae Elaeocarpus hookerianus Tararuas, Wellington J. A. Rattenbury 2n = 30 136. Euphorbiaceae Homolanthus repandus New Caledonia I. A. Rattenbury 2n = 44 148. Papilionaceae Sophora microphylla (Auckland University College) 2n = 18 S. tetraptera (Auckland University College) 2n = 8II + 1IV S. tetraptera (Auckland University College) 2n = 18 S. prostrata (Auckland Domain) 2n = 18 167. Moraceae Paratrophis microphylla (Auckland University College) n = 14 194. Rutaceae Melicope ternata (Auckland University College) 2n = 18II M. simplex Waitakere Range, N. Auckland J A. Rattenbury 2n = 36 M. mantelli (hybrid) (Auckland University College) 2n = 18II 212. Araliaceae Schefflera digitata North Auckland A. Farnell 2n = 24 Nothopanax simplex National Park, Wellington J. A. Rattenbury 2n = 24

Nothopanax edgerleyi Waitakere Range, N. Auckland A. Farnell 2n = c.24 N. anomalum Waitakere Range, N. Auckland A. Farnell 2n = c. 24 N. parvum National Park, Wellington A. Farnell 2n = 24 N. colensoi Rotorua, Auckland A. Farnell 2n = c. 48 N. arboreum North Auckland A. Farnell 2n = c. 48 N. laetum Coromandel, North Auckland A. Farnell 2n = 48 Pseudopanax ferox Woodhill, North Auckland A. Farnell 2n = 48 Ps. discolor North Auckland A. Farnell 2n = 48 Ps. lessoni North Auckland A. Farnell 2n = 48 239. Gentianaceae Gentiana corymbifera (?) Mt. Robert, Nelson J. A. Rattenbury n = 18 242. Plantaginaceae Plantago raoulii Fiordland, Southland T. C. Chambers 2n = c. 48 P. spathulata South Island J. A. Rattenbury n = 24 P. brownii Harris Saddle, Otago J. A. Rattenbury 2n = 24 P. triandra Boulder Lake, Nelson J. A. Rattenbury n = 24 293. Liliaceae Arthropodium neo-caledonicum New Caledonia J. A. Rattenbury 2n = 22 Xeronema callistemon North Auckland T. C. Chambers 2n = 36 302. Araceae Colocasia antiquorum 23 named varieties New Caledonia 2n = 28 9 named varieties Loyalty Islands 2n = 28 2 named varieties New Caledonia R. C. Cooper and others 2n = 42 6 unnamed varieties New Hebrides 2n = 28 18 named varieties Polynesia 2n = 28 1 unnamed variety Cavalli Island, North Auckland T. C. Chambers 2n = 42 313. Agavaceae Cordyline australis (Auckland Univ. College) 2n = 19II C. banksii (Auckland Univ. College) 2n = 19II C. pumilio (Auckland Univ. College) 2n = 19II C. sp. Three Kings Island, N. Auckland G. T. S. Baylis n = 19 C. terminalis (Auckland, Private Garden) n = c. 76 Taetsia neo-caledonica New Caledonia J. A. Rattenbury 2n = 38