Pohutukawa Metrosideros excelsa, photographed by Ed323.

Belongs within: Myrtaceae.

Metrosideros is a genus of trees, shrubs and lianes found between Malaysia, Australia, New Zealand and islands of the Pacific.

Characters (from Allan 1961): Aromatic shrubs, trees or woody lianes with simple, opposite, gland-dotted, exstipulate leaves. Flowers in usually terminal cymes or racemes; receptacle adnate to ovary; sepals 5, imbricate; petals 5; stamens numerous, many more than petals; filaments filiform, anthers versatile. Ovary three-celled, style filiform, ovules numerous. Capsules coriaceous, loculicidally three-valved, or dehiscence irregular; seeds linear.

<==Metrosideros Banks ex Gaertn. 1788 A61
|–M. albiflora Sol. ex Gaertn. 1788 [incl. M. diffusa Cunn. 1839 non Melaleuca diffusa Forst. f. 1786] A61
|–M. carminea Oliver 1928 (see below for synonymy) A61
|–M. colensoi Hook. f. 1852 A61
|    |–M. c. var. colensoi A61
|    `–M. c. var. pendens (Col.) Kirk 1899 [=M. pendens Col. 1880] A61
|–M. collina ST99
|    |–M. c. ssp. collina ST99
|    `–M. c. ssp. polymorpha ST99
|–M. diffusa (Forst. f.) Smith 1797 (see below for synonymy) A61
|–M. excelsa Sol. ex Gaertn. 1788 [incl. M. tomentosa Rich. 1832] A61
|–M. fulgens Sol. ex Gaertn. 1788 A61 (see below for synonymy)
|–M. kermadecensis Oliver 1928 (see below for synonymy) A61
|–M. macropus WO05
|–M. parkinsonii Buchan. 1883 A61
|–M. perforata (Forster & Forster) Rich. 1832 (see below for synonymy) A61
|–M. robusta Cunn. 1839 (see below for synonymy) A61
|–M. × sub-tomentosa Carse 1927 [M. excelsa × M. robusta] A61
|–M. umbellata Cav. 1795 A61 (see below for synonymy)
`–M. villosa Smith 1797 C06

Metrosideros carminea Oliver 1928 [incl. M. diffusa Hook. f. 1852 nec Melaleuca diffusa Forst. f. 1786 nec Met. diffusa Cunn. 1839] A61

Metrosideros diffusa (Forst. f.) Smith 1797 [=Melaleuca diffusa Forst. f. 1786; incl. Met. hypericifolia Cunn. 1839 non Salisb. 1796, Met. subsimilis Colenso 1880] A61

Metrosideros fulgens Sol. ex Gaertn. 1788 A61 [incl. Met. aurata Colenso 1891 A61, Met. florida var. aurata A27, Melaleuca florida Forst. f. 1786 A61, Leptospermum scandens Forster & Forster 1776 A61, Metrosideros scandens (Forster & Forster) Druce 1917 A61, Met. speciosa Col. 1890 A61]

Metrosideros kermadecensis Oliver 1928 [incl. M. polymorpha Hook. f. 1864 non Gaud. 1826, M. villosa Kirk 1899 non Smith 1797] A61

Metrosideros perforata (Forster & Forster) Rich. 1832 [=Leptospermum perforatum Forster & Forster 1776, Melaleuca perforata Forst. f. 1786; incl. Metrosideros buxifolia Cunningham 1839, Mel. scandens Sol. ex Gaertn. 1788, Met. tenuifolium Colenso 1892, Met. vesiculata Colenso 1884] A61

Metrosideros robusta Cunn. 1839 [incl. M. florida Hook. f. 1849 non Melaleuca florida Forst. f. 1786, M. robusta var. intermedia Kirk 1899, M. robusta var. retusa Kirk 1899] A61

Metrosideros umbellata Cav. 1795 A61 [=Agalmanthus umbellatus C06; incl. Melaleuca lucida Forst. f. 1786 non Linn. f. 1781 A61, Met. lucida (Forster) Rich. 1832 A61]

*Type species of generic name indicated


[A61] Allan, H. H. 1961. Flora of New Zealand vol. 1. Indigenous Tracheophyta: Psilopsida, Lycopsida, Filicopsida, Gymnospermae, Dicotyledones. R. E. Owen, Government Printer: Wellington (New Zealand).

[A27] Andersen, J. C. 1927. Popular names of New Zealand plants. Part 2. Transactions and Proceedings of the New Zealand Institute 57: 905–977.

[C06] Cheeseman, T. F. 1906. Manual of the New Zealand Flora. John Mackay, Government Printer: Wellington.

[ST99] Saenz, G. S., & J. W. Taylor. 1999. Phylogenetic relationships of Meliola and Meliolina inferred from nuclear small subunit rRNA sequences. Mycological Research 103 (8): 1049–1056.

[WO05] Wilson, P. G., M. M. O’Brien, M. M. Heslewood & C. J. Quinn. 2005. Relationships within Myrtaceae sensu lato based on a matK phylogeny. Plant Systematics and Evolution 251: 3–19.

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