OngTeh Editorial Team · Published 26 October 2026
Leptospermum scoparium · Myrtaceae
Mānuka / kahikātoa; also called tea tree
Not naturally a source of Camellia tea caffeine in a pure leaf infusion
Why is mānuka called tea tree?
New Zealand’s Department of Conservation describes mānuka or kahikātoa as Leptospermum scoparium. It reports that Captain Cook and early settlers used its leaves as a substitute for tea, which contributed to the common name “tea tree.”
This common name does not mean mānuka is Camellia sinensis. It also should not be used interchangeably with Australian tea-tree oil species. The names describe different plants and products.
Do mānuka and kānuka mean the same plant?
No. The Department of Conservation states that mānuka and kānuka can look superficially alike yet are distinct plants. In botanical writing, identification should use a verified scientific name rather than relying on the English phrase “tea tree.”
Te Papa records historical botanical uses but explicitly notes that some early written accounts are unverified. A museum account of traditional practice is evidence for historical reporting, not a modern dosage guide.
Is a mānuka infusion a medical treatment?
No clinical benefit should be inferred from the word tea, tea tree, or mānuka honey. Leaves, bark, honey and concentrated oils are different materials and their evidence is not interchangeable.
There is no universal food-grade preparation or safe medicinal dose established by the cited cultural sources. Do not substitute a wild-foraged or essential-oil product for a professionally assessed treatment.
How ONGTEH classifies it
Historical botanical drink/tea substitute, not a seventh tea-processing family. If a modern blend contains Camellia leaves, it should be classified as a blend with tea and any relevant caffeine and ingredient disclosures.
Claim-level source review
Checked 26 October 2026. The following statements describe the scope of particular primary, academic or institutional sources; they do not certify every statement elsewhere in this article, a commercial product or a clinical effect.
New Zealand’s Department of Conservation identifies mānuka/kahikātoa as Leptospermum scoparium and distinguishes it from the superficially similar kānuka. These vernacular names should not be treated as interchangeable botanical IDs. [Native-plant identification: Read native-plant identification source ↗]
The same agency associates the English common name “tea tree” with Captain Cook’s naming of mānuka. This common name is not evidence that the plant belongs to Camellia sinensis. [Historical common name: Read historical common name source ↗]
The Department of Conservation describes substantial variation in mānuka growth form; a retail leaf product called “tea tree” therefore still needs ingredient identification rather than identification from the common name alone. [Identification limitations: Read identification limitations source ↗]
Still open: claims not reviewed here, source revisions, regional variants, exact product composition and any medical or seller authentication assertions need their own evidence.
Sources and verification
The references below support named plant identities and documented cultural practices. They do not independently certify consumer products, establish universal recipes, or prove medical treatment efficacy.
- New Zealand Department of Conservation — Mānuka/kahikātoa and kānuka
- Museum of New Zealand Te Papa — Māori medicine and source limitations
- New Zealand National Library — Mānuka name authority
How to cite this entry
OngTeh Editorial Team (2026). Mānuka tea-tree infusion: what the name means. OngTeh. https://ongteh.com/tea-new-zealand-manuka-tea-tree.html
Cultural descriptions are attributed to their sources; they should not be substituted for plant identification, dietary labels, or individualized medical advice. See our editorial standards and Tea Evidence Desk.