Persoonia glaucescens

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Persoonia glaucescens
Persoonia glaucescens.jpg
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Proteales
Family: Proteaceae
Genus: Persoonia
Species:
P. glaucescens
Binomial name
Persoonia glaucescens
Synonyms [2]
  • Persoonia glaucescensSieber ex Schult. & Schult.f. nom. illeg., nom. superfl.
  • Persoonia lanceolata subsp. B
  • Persoonia lanceolata var. glaucescens(Sieber ex Spreng.) Endl.

Persoonia glaucescens, commonly known as the Mittagong geebung, [1] is a species of flowering plant in the family Proteaceae and is endemic to New South Wales. It is an erect shrub with smooth bark, hairy young branchlets, lance-shaped leaves with the narrower end towards the base, and yellow flowers. It is the only persoonia in eastern Australia with strongly glaucous leaves.

Contents

Description

Persoonia glaucescens is an erect shrub that typically grows to a height of 0.5–1.6 m (1 ft 8 in – 5 ft 3 in), sometimes to 3 m (9.8 ft), with smooth bark, brownish red branches and branchlets that are covered with greyish hairs when young. The leaves are narrow spatula-shaped to lance-shaped with the narrower end towards the base, strongly glaucous, especially when young, 30–80 mm (1.2–3.1 in) long, 4–18 mm (0.16–0.71 in) wide and twisted through 90° at the base. The flowers are arranged in groups of up to thirty along a rachis up to 190 mm (7.5 in) long, each flower on a hairy pedicel 1–3 mm (0.039–0.118 in) long. The tepals are yellow, 11–12 mm (0.43–0.47 in) long and sparsely to moderately hairy on the outside. Flowering occurs from January to May and the fruit is a fleshy green drupe with purple markings, and contain a single seed. This species is the only persoonia in eastern Australia to have strongly glaucous leaves. [1] [3] [4] [5]

Taxonomy

Persoonia glaucescens was first formally described in 1827 by Kurt Polycarp Joachim Sprengel in the 17th edition of Systema Vegetabilium from an unpublished description by Franz Sieber. [6] [7] In 1848, Stephan Endlicher reduced the species to a variety as Persoonia lanceolata var. glaucescens. [8]

Lawrie Johnson originally thought that P. lanceolata and the present species grew in separate areas, and gave it the name Persoonia subsp. B, but more recent fieldwork by Peter Weston showed that they do sometimes grow together without appearing to interbreed. As a result, Weston reinstated the name P. glaucescens, publishing the change in the journal Telopea . [9]

Within the genus, P. glaucescens is classified in the Lanceolata group, a group of 58 closely related species with similar flowers but very different foliage. These species will often interbreed with each other where two members of the group occur. [10]

Distribution and habitat

Mittagong geebung occurs in small scattered patches in an area bordered by Buxton to the north and Berrima to the south, having vanished from the vicinities of Thirlmere Lakes and Fitzroy Falls. It grows on clay and gravel soils over laterite on upper slopes and ridges, at altitudes between 400 and 650 m (1,310 and 2,130 ft). It is found in dry sclerophyll eucalypt forest with such trees as red bloodwood ( Corymbia gummifera ), scribbly gum ( Eucalyptus sclerophylla ), Sydney peppermint ( E. piperita ), silvertop ash ( E. sieberi ), narrow-leaved stringybark ( E. sparsifolia ), grey gum ( E. punctata ) and, at higher elevations, snow gum ( E. pauciflora ). [5] [11] The increased light and lack of competing plants means the species adapts preferably to (and can be found on) road verges. [1]

Conservation status

Persoonia glaucescens is classified as "vulnerable" under the Australian Government Environment Protection and Biodiversity Conservation Act 1999 and as "endangered" under the New South Wales Government Biodiversity Conservation Act 2016 . The main threats to the species include trail and road maintenance, inappropriate fire regimes and grazing. [1] [12]

Related Research Articles

<i>Persoonia</i> Genus of shrubs and small trees in the family Proteaceae

Persoonia, commonly known as geebungs or snottygobbles, is a genus of about one hundred species of flowering plants in the family Proteaceae. Plants in the genus Persoonia are shrubs or small trees usually with smooth bark, simple leaves and usually yellow flowers arranged along a raceme, each flower with a leaf or scale leaf at the base. The fruit is a drupe.

Persoonia micranthera, commonly known as the small-flowered snottygobble, is a species of flowering plant in the family Proteaceae and is endemic to a restricted area in the south-west of Western Australia. It is a low-lying to prostrate shrub with branchlets that are hairy when young, spatula-shaped to lance-shaped leaves with the narrower end towards the base, hairy yellow flowers borne in groups of four to fifteen, and smooth, oval fruit.

<i>Grevillea laurifolia</i> Species of shrub in the family Proteaceae endemic to eastern Australia

Grevillea laurifolia, commonly known as laurel-leaf grevillea, is a species of flowering plant in the family Proteaceae and is endemic to New South Wales. It is a prostrate, trailing shrub with egg-shaped, heart-shaped or round leaves, and clusters of reddish to deep maroon flowers.

<i>Persoonia lanceolata</i> Shrub in the family Proteaceae native to New South Wales in eastern Australia

Persoonia lanceolata, commonly known as lance-leaf geebung, is a shrub native to New South Wales in eastern Australia. It reaches 3 m (10 ft) in height and has smooth grey bark and bright green foliage. Its small yellow flowers grow on racemes and appear in the austral summer and autumn, followed by green fleshy fruits which ripen the following spring. Within the genus Persoonia, P. lanceolata belongs to the lanceolata group of 58 closely related species. It interbreeds with several other species found in its range.

<i>Persoonia rigida</i> Species of flowering plant

Persoonia rigida, commonly known as the rigid-, hairy- or stiff geebung, is a species of flowering plant in the family Proteaceae and is endemic to south-eastern Australia. It is an erect to low-lying shrub with hairy young branchlets, lance-shaped to spatula-shaped leaves that are hairy when young, and yellow flowers borne in groups of up to twenty on a rachis up to 90 mm (3.5 in) long that continues to grow after flowering.

<i>Persoonia chamaepitys</i> Species of flowering plant

Persoonia chamaepitys, commonly known as the prostrate- or mountain geebung, is a shrub endemic to New South Wales in eastern Australia. It has a prostrate habit, reaching only 20 cm (7.9 in) high but spreading up to 2 m (6.6 ft) across, with bright green spine-like leaves and small yellow flowers appearing in summer and autumn.

<i>Persoonia pauciflora</i> Species of flowering plant

Persoonia pauciflora, commonly known as the North Rothbury persoonia, is a plant in the family Proteaceae and is endemic to a small area of New South Wales. It is a small, spreading shrub with bright green, thread-like leaves and a relatively small number of yellow flowers in summer. A recently described species, it is similar to P. isophylla but has fewer and shorter flowers than that species. A very restricted distribution has led to its classification as "critically endangered" under the Australian Government Environment Protection and Biodiversity Conservation Act 1999.

<i>Persoonia oxycoccoides</i> Species of flowering plant

Persoonia oxycoccoides is a species of flowering plant in the family Proteaceae and is endemic to New South Wales. It is a spreading to prostrate shrub with smooth bark, hairy young branchlets, elliptic to egg-shaped leaves and yellow flowers arranged in groups of up to thirteen along a rachis that continues to grow after flowering.

<i>Persoonia myrtilloides</i> Species of flowering plant

Persoonia myrtilloides, commonly known as myrtle geebung, is a plant in the family Proteaceae and is endemic to New South Wales. It is an erect to spreading shrub with elliptic to egg-shaped leaves and yellow flowers in groups of up to forty on a rachis up to 170 mm (6.7 in) long.

<i>Persoonia bargoensis</i> Species of flowering plant

Persoonia bargoensis, commonly known as the Bargo geebung, is a species of flowering plant in the family Proteaceae and is endemic to a restricted area of New South Wales. It is an erect shrub with linear to lance-shaped leaves, yellow, tube-shaped flowers and green, pear-shaped fruit.

<i>Persoonia elliptica</i> Species of flowering plant

Persoonia elliptica, commonly known as snottygobble or spreading snottygobble, is a plant in the family Proteaceae and is endemic to the south-west of Western Australia. It is an erect shrub or small tree with egg-shaped or lance-shaped leaves and groups of cylindrical yellow flowers. It usually grows in woodland or forest dominated by jarrah or marri within 50 km (30 mi) of the coast.

<i>Persoonia media</i> Species of flowering plant

Persoonia media is a species of flowering plant in the family Proteaceae and is endemic to eastern Australia. It is an erect to spreading shrub or tree with branchlets and leaves that are glabrous or only sparsely hairy, elliptic to egg-shaped leaves and up to sixteen yellow flowers on a rachis up to 150 mm (5.9 in) long.

<i>Persoonia helix</i> Species of flowering plant

Persoonia helix is a species of flowering plant in the family Proteaceae and is endemic to the south-west of Western Australia. It is an erect to spreading shrub with hairy young branchlets, twisted leaves and bright yellow flowers borne singly or in groups of up to five on a rachis up to 25 mm (0.98 in) long.

<i>Persoonia brevirhachis</i> Species of flowering plant

Persoonia brevirhachis is a species of flowering plant in the family Proteaceae and is endemic to the south-west of Western Australia. It is an erect, often spreading shrub with smooth, compact bark, mostly narrow spatula-shaped to lance-shaped leaves with the narrower end towards the base and yellow to greenish yellow flowers borne singly or in pairs in leaf axils.

Persoonia bowgada is a species of flowering plant in the family Proteaceae and is endemic to the south-west of Western Australia. It is an erect to spreading shrub with smooth bark, more or less cylindrical leaves and yellow flowers in groups of up to ten on the ends of branches.

<i>Persoonia cymbifolia</i> Species of flowering plant

Persoonia cymbifolia is a species of flowering plant in the family Proteaceae and is endemic to the south of Western Australia. It is an erect, spreading shrub with smooth bark, hairy young branchlets, linear to narrow oblong leaves and yellow flowers borne singly or in groups of up to three on a short rachis.

<i>Persoonia iogyna</i> Species of flowering plant

Persoonia iogyna is a species of flowering plant in the family Proteaceae and is endemic to south-eastern Queensland. It is an erect shrub or small tree with hairy young branchlets, narrow elliptical to lance-shaped leaves, yellow flowers and green fruit.

Persoonia tropica is a plant in the family Proteaceae and is endemic to north Queensland. It is an erect shrub to small tree shrub with branchlets that are hairy when young, narrow elliptic to lance-shaped leaves and yellow flowers in groups of three to ten on a rachis 3–10 mm (0.12–0.39 in) long that continues to grow after flowering.

Persoonia pentasticha is a species of flowering plant in the family Proteaceae and is endemic to the south-west of Western Australia. It is an erect, spreading shrub with hairy young branchlets, linear leaves with five narrow, longitudinal grooves, and hairy yellow flowers borne in groups of up to fifteen on a rachis up to 45 mm (1.8 in) long.

Persoonia papillosa is a species of flowering plant in the family Proteaceae and is endemic to a restricted area in the west of Western Australia. It is a small, erect shrub with hairy young branchlets, linear leaves with six prominent parallel veins, and hairy flowers borne in groups of up to twenty on a rachis up to 60 mm (2.4 in) long.

References

  1. 1 2 3 4 5 "Mittagong Geebung – profile". Department of Environment and Conservation (NSW) Threatened Species website. Department of Environment and Conservation (NSW). 30 September 2005. Retrieved 14 November 2015.
  2. 1 2 "Persoonia glaucescens". Australian Plant Census. Retrieved 14 October 2020.
  3. ↑ Weston, Peter H. (1995). "Persoonioideae". In McCarthy, Patrick (ed.). Flora of Australia: Volume 16: Eleagnaceae, Proteaceae 1. Collingwood, Victoria: CSIRO Publishing / Australian Biological Resources Study. ISBN   0-643-05693-9.
  4. ↑ Weston, Peter H. "Persoonia glaucescens". Royal Botanic Garden Sydney. Retrieved 14 October 2020.
  5. 1 2 Benson, Doug; McDougall, Lyn (2000). "Ecology of Sydney Plant Species Part 7b: Dicotyledon families Proteaceae to Rubiaceae". Cunninghamia. 6 (4): 1099. Retrieved 14 October 2020.
  6. ↑ "Persoonia glaucescens". APNI. Retrieved 14 October 2020.
  7. ↑ Sprengel, Kurt P.J.; Linnaeus, Carl (ed.); Dieterich, Johann C.; Sprengel, Anton (1827). "Curae Posteriores". Systema Vegetabilium. 4 (2): 45. Retrieved 14 October 2020.{{cite journal}}: |first2= has generic name (help)
  8. ↑ "Persoonia lanceolata var. glaucescens". APNI. Retrieved 14 October 2020.
  9. ↑ Weston, Peter H.; Johnson, Lawrence Alexander Sydney (1991). "Taxonomic changes in Persoonia (Proteaceae) in New South Wales". Telopea. 4 (2): 369–406 [284]. doi: 10.7751/telopea19914929 .
  10. ↑ Weston, Peter H. (2003). "Proteaceae subfamily Persoonioideae: Botany of the Geebungs, Snottygobbles and their Relatives". Australian Plants . 22 (175): 62–78 [70]. ISSN   0005-0008.
  11. ↑ "Threatened species information: Persoonia glaucescens" (PDF). Department of Environment and Conservation (NSW) Threatened Species website. Department of Environment and Conservation (NSW). September 2000. Retrieved 14 November 2015.
  12. ↑ "Approved Conservation Advice for Persoonia glaucescens (Mittagong Geebung)" (PDF). Australian Government Department of the Environment. Retrieved 15 October 2020.
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