Stockwellia

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Scientific classification Edit this classification
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Binomial name
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Synonyms[3]Template:R/superscript[4]Template:R/superscript
  • Myrtaceae Gen. nov. sp. (Boonjie BH 6589)

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Stockwellia is a monotypic genus in the flowering plant family Myrtaceae.[1]Template:R/superscript The sole species in the genus, Stockwellia quadrifida (commonly known as Vic Stockwell's puzzle), is endemic to Queensland.[1]Template:R/superscript[3]Template:R/superscript

Description

Stockwellia quadrifida is a very large rainforest emergent, growing up to 40 m (130 ft) tall and Template:Cvt DBH.[1]Template:R/superscript It has straight boles with reddish-brown flaky bark and buttress roots up to Template:Cvt high.[1]Template:R/superscript[6]Template:R/superscript[7]Template:R/superscript[8]Template:R/superscript

The leaves are opposite to sub-opposite, glabrous, elliptic and leathery, measuring up to Template:Cvt long by Template:Cvt wide and turning red before falling.[1]Template:R/superscript[3]Template:R/superscript

Inflorescences are axillary, produced in groups of three sessile flowers on a peduncle measuring 10 to 25 mm (0.4 to 1.0 in) in length.[1]Template:R/superscript The fruits are a fused woody capsule containing oval-shaped seeds measuring up to 11 by 6.5 mm (0.4 by 0.3 in).[1]Template:R/superscript

Discovery

This species first became known to botanical science in 1971, when Atherton resident Keith Gould began experimenting with aerial photography as a means of forestry interpretation. Some of his photos appeared to show a large group of emergent trees in a small patch of rainforest near Topaz, and he referred them to Victor (Vic) Stockwell who was Queensland Forestry's ranger responsible for managing timber harvesting in that area.[6]Template:R/superscript[7]Template:R/superscript Despite Stockwell's vast experience in forestry he was unable to identify the trees from the photos, and so the two men ventured on foot into the forest to find them. When they encountered the trees, Stockwell realised that this was a species unknown both to himself and to botany in general.[6]Template:R/superscript[7]Template:R/superscript[9]Template:R/superscript

Stockwell was surprised to discover a tree (especially a tree so massive, and growing close to forestry roads) of which he was unaware. It quickly aroused interest in botanical circles and became known colloquially as "Vic Stockwell's Puzzle", and was even mentioned in a scientific paper as Stockwellia long before a formal description and name was published.[1]Template:R/superscript[6]Template:R/superscript[7]Template:R/superscript

Distribution and habitat

This species is endemic to a very small part of the luxuriant Wet Tropics rainforests of north-eastern Queensland, specifically an area on the western slopes of Mount Bartle Frere where it is found only in well-developed rainforest. It occurs within an altitude range of about 500–750 m (1,600–2,500 ft).[1]Template:R/superscript[3]Template:R/superscript[4]Template:R/superscript The area of occupancy of this species is just Template:Cvt.[10]Template:R/superscript[a]

Taxonomy

The genus Stockwellia and the species S. quadrifida were first formally described in 2002, some thirty years after its discovery. The Australian botanists Denis John Carr, Maisie Carr and Bernard Hyland published their collaboration in the Botanical Journal of the Linnean Society, based on material collected by Hyland.[1]Template:R/superscript

Phylogeny

Genetic studies have shown that Stockwellia belongs in the "Eucalyptopsis alliance" (along with the genera Eucalyptopsis and Allosyncarpa) and that Allosyncarpa is basal to this group while the other two are sister taxa.[1]Template:R/superscript The closest relatives, therefore, are Eucalyptopsis alauda and Eucalyptopsis papuana (both from New Guinea and the only two species in the genus), and Allosyncarpia ternata (another monotypic genus) from the Northern Territory.[1]Template:R/superscript[11]Template:R/superscript

Etymology

The genus name is in honour of Vic Stockwell, being the first to identify the plant as an unknown species. The species epithet quadrifida is derived from the Latin quattuor (four), and -fidus (divided), referring to the four segments of the hypanthium.[1]Template:R/superscript

Conservation status

This species is listed by the Queensland Department of Environment and Science as vulnerable.[5]Template:R/superscript As of 2 November 2023, it has not been assessed by the IUCN.

In the 2002 paper that formally describes S. quadrifida, the authors stated that despite its restricted range the only threat to the species is predation of the seeds by sulphur-crested cockatoos (Cacatua galerita).[1]Template:R/superscript However a new threat has recently appeared that may be of concern. The Australian botanist Andrew Thornhill wrote in an informal (i.e. not peer reviewed) article in The Conversation that he and fellow botanist Stuart Worboys recently[b] visited these trees, at which time Worboys observed evidence of the fungus myrtle rust on the leaves. Thornhill wrote:Page Template:Blockquote/styles.css has no content.

The Australian Myrtaceae have had no time to adapt to myrtle rust. What is happening now could cause the extinction of some extremely unique Australian plants – including Stockwellia.

suggesting that the status of this newly discovered species may change in the future.[7]Template:R/superscript

Ecology

The seeds are eaten by sulphur-crested cockatoos.[1]Template:R/superscript[4]Template:R/superscript

References

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  1. ^ a b c d e f g h i j k l m n o p q Page Module:Citation/CS1/styles.css has no content.Carr, Denis J.; Carr, Stella G. M.; Hyland, Bernie P. M.; Wilson, Peter G.; Ladiges, Pauline Y. (2002). "Stockwellia quadrifida (Myrtaceae), a new Australian genus and species in the eucalypt group". Botanical Journal of the Linnean Society. 139 (4): 415–421. doi:10.1046/j.1095-8339.2002.00062.x.
  2. ^ a b Page Module:Citation/CS1/styles.css has no content."Stockwellia quadrifida". Australian Plant Name Index (APNI). Centre for Plant Biodiversity Research, Australian Government. Retrieved 2 September 2021.
  3. ^ a b c d Page Module:Citation/CS1/styles.css has no content.F.A. Zich; B.P.M Hyland; T. Whiffen; R.A. Kerrigan (2020). "Stockwellia quadrifida". Australian Tropical Rainforest Plants, Edition 8. Commonwealth Scientific and Industrial Research Organisation (CSIRO). Retrieved 5 March 2021.
  4. ^ a b c Page Module:Citation/CS1/styles.css has no content.Cooper, Wendy; Cooper, William T. (June 2004). Fruits of the Australian Tropical Rainforest. Clifton Hill, Victoria, Australia: Nokomis Editions. p. 355. ISBN 9780958174213. Retrieved 5 March 2021.
  5. ^ a b Page Module:Citation/CS1/styles.css has no content."Species profile—Stockwellia quadrifida". Queensland Department of Environment and Science. Queensland Government. 20 October 2014. Retrieved 2 September 2021.
  6. ^ a b c d Page Module:Citation/CS1/styles.css has no content.Elick, Rebel; Wilson, Peter (December 2002). "The discovery of Stockwellia (Myrtaceae)" (PDF). Australasian Systematic Botany Society Newsletter. 113 (December): 15–16. ISSN 1034-1218. Retrieved 3 December 2013.
  7. ^ a b c d e Page Module:Citation/CS1/styles.css has no content.Thornill, Andrew (2019). "Vic Stockwell's Puzzle is an unlikely survivor from a different epoch". The Conversation. The Conversation Media Group Ltd. Retrieved 2 September 2021.
  8. ^ Page Module:Citation/CS1/styles.css has no content."Specimen Details". Herbweb. Royal Botanic Gardens, Kew. Retrieved 3 September 2021.
  9. ^ Page Module:Citation/CS1/styles.css has no content.Breeden, Stanley (1992). Visions of a Rainforest: A year in Australia's tropical rainforest. Illustrated by William T. Cooper. Foreword by Sir David Attenborough. (1st ed.). East Roseville: Simon & Schuster Australia. pp. 170–173. ISBN 978-0-7318-0058-2. Retrieved 3 December 2013.
  10. ^ Page Module:Citation/CS1/styles.css has no content."Spatial portal". Atlas of Living Australia. Retrieved 3 November 2023.
  11. ^ Page Module:Citation/CS1/styles.css has no content.Udovicic, Frank; Ladiges, Pauline Y. (2000). "Informativeness of nuclear and chloroplast DNA regions and the phylogeny of the eucalypts and related genera". Kew Bulletin. 55 (3): 633–645. doi:10.2307/4118780. JSTOR 4118780.

Notes

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  1. ^ For a definition of Area of Occupancy see this page at the Atlas of Living Australia
  2. ^ Thornhill wrote: "More than a decade after the species was officially named...", i.e. later than 2012

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