Telopea aspera

Telopea aspera, commonly known as the Gibraltar Range waratah, is a plant in the family Proteaceae. It grows as a woody shrub to 3 metres (10 ft) high with leathery rough leaves and bright red flower heads known as inflorescences—each composed of hundreds of individual flowers. It is endemic to the New England region in New South Wales in Australia. It was formally described as a species by botanists Peter Weston and Mike Crisp in 1995, separated from its close relative Telopea speciosissima by its rough foliage and preference for dryer habitat. Unlike its better known relative, Telopea aspera has rarely been cultivated.

Gibraltar Range waratah
Telopea aspera in the Gibraltar Range National Park.
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Proteales
Family: Proteaceae
Genus: Telopea
Species:
T. aspera
Binomial name
Telopea aspera
Crisp & P.H.Weston[1]

Description

The Gibraltar Range waratah is a large erect shrub up to 3 metres (10 ft) in height with one or more stems. It has dull green leaves which are alternate, and are more coarsely-toothed than its southern relative, with 3–11 serrations on each leaf margin. Measuring 8–28 cm long and 2–6.5 cm wide, the leaves are tough and leathery with furry undersurfaces. There are prominent veins on both the upper and lower leaf surfaces. The inflorescences, which appear in spring, are large and crimson coloured. They consist of a large domed flowerhead ringed by bracts. There are anywhere from 90 to 250 individual flowers making up the flower head.[2] These are followed by large seed pods which eventually turn brown and split open revealing winged seeds inside.

T. aspera (habit)

Taxonomy

Telopea aspera is one of five species from south eastern Australia which make up the genus Telopea. Its closest relative is the very similar New South Wales waratah (T. speciosissima) from the Sydney region in central New South Wales, from which it was only recognised as a separate species in 1991, having previously been considered an unusual northern population.[3] Initially provisionally called Telopea sp. A,[4] it was formally described as Telopea aspera in 1995.[3] The species name is derived from the Latin adjective asper "rough", and relates to the leaves.[5]

The genus is classified in the subtribe Embothriinae of the Proteaceae, along with the tree waratahs (Alloxylon) from eastern Australia and New Caledonia, and Oreocallis and the Chilean firetree (Embothrium coccineum) from South America.[6][7] Almost all these species have red terminal flowers, and hence the subtribe's origin and floral appearance must predate the splitting of Gondwana into Australia, Antarctica, and South America over 60 million years ago.[8]:19

Distribution and habitat

Telopea aspera is endemic to northern New South Wales, where it is restricted to the Gibraltar Range. Found in dry sclerophyll forest,[2] it is a component of three plant communities within Gibraltar Range: the first is composed of Gibraltar ash (Eucalyptus olida), privet-leaved stringybark (Eucalyptus ligustrina) and diehard stringybark (Eucalyptus cameronii) and occurs on slopes and crests, while the second is composed of Gibraltar ash, large-fruited blackbutt (Eucalyptus pyrocarpa) and needlebark stringybark (Eucalyptus planchoniana) and occurs on ridges and north and west-facing slopes. Both are shrubby to open woodland communities found on skeletal to shallow soil on granite. The third community is a more sheltered one of New England blackbutt (Eucalyptus campanulata) and diehard stringybark found on lower slopes on sandy or loam soils.[9]

It has been classified as a Rare or Threatened Australian Plant (ROTAP) by the New South Wales government.

Ecology

Telopea aspera resprouts from a woody lignotuber after bushfire.[10] It stores energy and nutrients as a resource for rapid growth after a bushfire.[8]:25–26

The prominent position and striking colour of most members of the subtribe Embothriinae both in Australia and South America strongly suggest they are adapted to pollination by birds, and have been for over 60 million years.[8]:19

Cultivation

Telopea aspera has been rarely cultivated, though it is possible that some garden specimens thought to be T. speciosissima may in fact have been this species. Plants have fared poorly at Australian Botanic Garden Mount Annan, perishing in summer, though the reason for this is not known. Cultivation of T. aspera at Mount Tomah Botanic Gardens has been more successful. The flowers and foliage are attractive horticultural features.[5]

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References
  1. "Telopea aspera Crisp & P.H.Weston". Australian Plant Name Index (APNI), IBIS database. Centre for Plant Biodiversity Research, Australian Government.
  2. Crisp, Michael D.; Weston, Peter H. "Telopea aspera (Sm.) R.Br". New South Wales Flora Online. Retrieved 8 January 2015.
  3. Crisp, Michael D.; Weston, Peter H. (1995). "Telopea". In McCarthy, Patrick (ed.). Flora of Australia: Volume 16: Eleagnaceae, Proteaceae 1. CSIRO Publishing / Australian Biological Resources Study. pp. 386–390. ISBN 0-643-05693-9.
  4. "Telopea sp. A". Australian Plant Name Index (APNI), IBIS database. Centre for Plant Biodiversity Research, Australian Government.
  5. Walters, Brian (October 2008). "Telopea aspera". Plant Guides. Australian Native Plants Society (Australia). Retrieved 8 January 2015.
  6. Johnson, L. A. S.; Briggs, Barbara G. (1975). "On the Proteaceae: the evolution and classification of a southern family". Botanical Journal of the Linnean Society. 70 (2): 83–182. doi:10.1111/j.1095-8339.1975.tb01644.x.
  7. Weston, Peter H.; Barker, Nigel P. (2006). "A new suprageneric classification of the Proteaceae, with an annotated checklist of genera". Telopea. 11 (3): 314–44.
  8. Nixon, Paul (1989). The Waratah (2nd ed.). East Roseville, New South Wales: Kangaroo Press. ISBN 0-86417-878-6.
  9. Hunter, John T.; Sheringham, Paul (2008). "Vegetation and floristic diversity in Gibraltar Range and part of Washpool National Parks, New South Wales" (PDF). Cunninghamia. 10 (3): 439–74.
  10. Croft, Peter; Hofmeyer, Damien; Hunter, John T. (2006). "Fire Responses in Four Rare Plant Species at Gibraltar Range". Proc. Linn. Soc. N.S.W. 127: 57–62.
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