Tasmania’s true botanical icon: the Delicate Laurel (Tetracarpaea tasmannica)

Tetracarpaea tasmannica (Delicate Laurel)

The Blue Gum (Eucalyptus globulus), Tasmanian Waratah (Telopea truncata), Deciduous Beech (Nothofagus gunnii), Myrtle Beech (Nothofagus cunninghamii) and Pandani (Richea pandanifolia) are names that are often cited by plant enthusiasts and bushwalkers guidebooks as ‘must-sees’ of Tasmania.

But these five iconic plants, showy and famous as they are, must defer to the ONE true botanical icon that represents Tasmania — the Delicate Laurel (Tetracarpaea tasmannica).

It is time to remedy the unfortunate oversight of the Delicate Laurel’s absence from the popular portraiture of Tasmania’s botanical gems.

The Delicate Laurel is not an uncommon plant of subalpine shrubberies in the western mountains. However, it blends quite immaculately into the surrounding scrub and is not extremely prominent unless in flower.

Without consciously looking for it however, Tetracarpaea would be quite easy to overlook whilst hiking pass the lush shrubbery vegetation. Once known however, the plant is easily recognizable by it’s thick leathery serrated leaves.

The erect flower stalks bear small odd-looking white flowers with 4-5 oversized carpels (female parts). The brown dry fruits (folicles) are also quite distinctive.

Tetracarpaea tasmannica (Delicate Laurel)

Distinctive as it is, the history of how the plant was named and classified has been fraught with difficulty and confusion (See Tasmanian Flora online profile).

The eminent botanist Joseph Dalton Hooker is often attributed with having named and described the plant but it has only recently been clarified that it was his father, Sir William Jackson Hooker that had found and described the plant (The original illustration of the plant in Sir William Hooker’s Icones Platarum may be found here).

It was also only recently that the correct species epithet ‘tasmannica‘ was reinstated, as opposed to the commonly but mistakenly used ‘tasmanica‘.

Botanists also have had difficulty determining what this enigmatic little shrub is related to.

They variously thought it to be related to the Horizontal bush (Anodopetalum biglandulosum), the Native Laurel (Anopterus glandulosus), and even Saxifrages.

Only recently have molecular methods demonstrated that the closest relatives of Tetracarpaea are actually raspworts (Gonocarpus spp. and Haloragis spp.) and watermilfoils (Myriophyllum spp.).

Still, the unique traits of the Delicate Laurel dictate that it is best placed in a family of it’s own, the Tetracarpaeaceae.

So there we have it. A true botanical orphan found ONLY in Tasmania.

The ONLY species in the genus.

The ONLY genus in it’s family.

A prime example of Tasmania’s botanical heritage.

Forget about beeches, waratahs, pandanis and blue gums.

These long revered icons have been discussed, photographed, drawn and stylized in Australian botany ad nauseum.

The true connoisseur of plants visiting Tasmania for the first time must embark on a montane pilgrimage and pursue first and foremost the one and only Tetracarpaea.

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About David Tng

I am David Tng, a hedonistic botanizer who pursues plants with a fervour. I chase the opportunity to delve into various aspects of the study of plants. I have spent untold hours staring at mosses and allied plants, taking picture of pollen, culturing orchids in clean cabinets, counting tree rings, monitoring plant flowering times, etc. I am currently engrossed in the study of plant ecology (a grand excuse to see 'anything I can). Sometimes I think of myself as a shadow taxonomist, a sentimental ecologist, and a spiritual environmentalist - but at the very root of it all, a "plant whisperer"!
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