Kunzea sinclairii, also known as the Great Barrier Island kānuka,[2] is a flowering plant in the myrtle family, Myrtaceae and is endemic to Great Barrier Island in the Auckland Region, New Zealand.
| Kunzea sinclairii | |
|---|---|
| |
| Kunzea sinclairii at the Auckland Botanic Gardens | |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Myrtales |
| Family: | Myrtaceae |
| Genus: | Kunzea |
| Species: | K. sinclairii
|
| Binomial name | |
| Kunzea sinclairii (Kirk) W.Harris
| |
| Synonyms | |
| |
Taxonomy and naming
editKunzea sinclairii was first formally described in 1899 by British botanist Thomas Kirk, who named the species Leptospermum sinclairii.[3] Kirk named the species after Andrew Sinclair, who he believed had originally discovered the plant.[4] Kirk visited Great Barrier Island in late 1867, during which time he likely collected specimens of the plant.[4] In 1983, Australian botanist Joy Thompson revised the genus Leptospermum, transferring the species within the genus Kunzea.[5] A new combination was published in 1987, making the plant's currently accepted name Kunzea sinclairii.[6][7]
Description
editKirk's original type description of the species is as follows:
Stems prostrate or suberect, 1 ft (0.30 m).-3 ft (0.91 m). high, spreading; young shoots and leaves white with loosely appressed silky hairs. Leaves linear-lanceolate or oblong-lanceolate, flat or concave. Flowers larger and pedicels longer than in L. ericoides, crowded, fasciculate or umbellate. Pedicels and calyx-tube silky, villous; calyx-tube narrow-turbinate; lobes oblong, subacute or rounded. Petals obovate. Ovary deeply sunk within the calyx-tube; style slender. Fruiting calyx-tube campanulate, silky.[3]
Kirk notes that the species is similar to K. ericoides, but the two species can be told apart due to the larger flowers of K. sinclairii, as well as the "white silky leaves" and because the "ovary is sunk fully one-third below the narrow calyx-tube, while the sepals and petals are narrower, and the style is extremely slender".[3]
The species typically grows into a wide-spreading shrub, however on occasion can grow into a tree that can reach as tall as 6 m (20 ft).[4]
Hybridisation
editThe species has been known to form a hybrid with K. linearis. Kunzea linearis × Kunzea sinclairii has been found on the western shores of Great Barrier Island.[4] The species has also been known to hybridise with Leptospermum scoparium (mānuka),[8] and with K. robusta.[9]
Distribution and habitat
editThis kunzea is endemic to Great Barrier Island in the Auckland Region, New Zealand.[4] It thrives in rocky tors, cliffs and gorges, usually dominating rocky habitats on the island.[4] K. sinclairii is estimated to cover 90.5 ha (224 acres) or 0.3% of the total land area of Great Barrier Island.[4]
Conservation status
editKunzea sinclairii is listed as "threatened – nationally critical" under the New Zealand threat classification series 3.[1]
Gallery
edit-
Lectotype of K. sinclairii from the Auckland War Memorial Museum herbarium -
Flowers of K. sinclairii -
K. sinclairii growing in a rocky canyon on Great Barrier Island
_W.Harris_(AM_AK5515).jpg)
References
edit- ^ a b "Kunzea sinclairii". New Zealand Threat Classification System. Retrieved 1 September 2024.
- ^ de Lange, P. J. "Kunzea sinclairii Fact Sheet". New Zealand Plant Conservation Network. Retrieved 1 September 2024.
- ^ a b c Kirk, Thomas (1899), The Students' Flora of New Zealand, doi:10.5962/BHL.TITLE.54373, OCLC 5905328, Wikidata Q47062405
- ^ a b c d e f g de Lange, Peter J (2014). "A revision of the New Zealand Kunzea ericoides (Myrtaceae) complex". PhytoKeys (40): 1–185. doi:10.3897/phytokeys.40.7973. PMC 4154306. PMID 25197228.
- ^ Thompson, Joy (13 October 1983). "Redefinitions and nomenclatural changes within the Leptospermum suballiance of Myrtaceae". Telopea. 2 (4): 379–383. doi:10.7751/TELOPEA19834403. ISSN 0312-9764. Wikidata Q55800102.
- ^ Harris, Warwick (1987). "Knowing kanuka as Kunzea" (PDF). Canterbury Botanical Society Journal. 21: 11–20.
- ^ Connor, H. E.; Edgar, E. (January 1987). "Name changes in the indigenous New Zealand flora, 1960–1986 and Nomina Nova IV, 1983–1986". New Zealand Journal of Botany. 25 (1): 115–171. doi:10.1080/0028825X.1987.10409961. ISSN 0028-825X. Wikidata Q54670220.
- ^ Patel, Rajni N. (September 1973). "Wood anatomy of the dicotyledons indigenous to New Zealand". New Zealand Journal of Botany. 11 (3): 421–434. doi:10.1080/0028825X.1973.10430292. ISSN 0028-825X. Wikidata Q59406397.
- ^ Heenan, Peter B.; McGlone, Matt S.; Mitchell, Caroline M.; Cheeseman, Dagmar F.; Houliston, Gary J. (7 April 2021). "Genetic variation reveals broad-scale biogeographic patterns and challenges species' classification in the Kunzea ericoides (kānuka; Myrtaceae) complex from New Zealand". New Zealand Journal of Botany. 60 (1): 2–26. doi:10.1080/0028825X.2021.1903946. ISSN 0028-825X. Wikidata Q114072136.