Daviesia corymbosa

narrow leaf bitter pea
Scientific classification
Kingdom:	Plantae
(unranked):	Angiosperms
(unranked):	Eudicots
(unranked):	Rosids
Order:	Fabales
Family:	Fabaceae
Genus:	Daviesia
Species:	D. corymbosa
Binomial name
	Daviesia corymbosa; Sm.
Synonyms
	Daviesia macrophylla Endl.

Daviesia corymbosa, also known as narrow leaf bitter pea, is a species of flowering plant in the family Fabaceae native to the state of New South Wales in eastern Australia. A shrub to 2 m (6.6 ft) high, it grows in sandstone soils in open eucalyptus woodland or heath. It produces showy flowerheads of red and yellow flowers in the spring and early summer.

Taxonomy

English botanist James Edward Smith formally described the species in 1805, which it still bears its original name,[1] and chose the genus named to honour Welsh botanist Hugh Davies. The specific epithet is named for corymb, or the arrangement of the flowers.[2] Daviesia corymbosa is most closely related to D. latifolia, D. laevis and D. laxiflora. Hybrids with D. latifolia and D. ulicifolia have been reported.[3]

Description

Daviesia corymbosa grows as an open shrub and reaches 2 m (6.6 ft) high. Like other members of the pea family it has phyllodes rather than leaves. These are variable in shape, ranging from obovate (egg-shaped) or oval to linear and measure 2–12 cm (1–4.5 in) long and 0.2–2.5 cm (0.079–0.984 in) wide, and are green in colour with a prominent network of veins.[4] The yellow to red flowers appear from August to December, but peak in Spring over September and October,[5] and are arranged in groups of 5 to 20 in umbelliform or corymbose racemes.[4] The seed pods ripen in November and December.[3]

The corymbose flowerheads of Daviesia corymbosa distinguish it from other bitter pea species. Furthermore, its green phyllodes contrast with the pale grey-green phyllodes of D. laevis and D. latifolia.[3]

Distribution and habitat

Daviesia corymbosa is endemic to New South Wales, where it is found on sandstone soils east of the Great Dividing Range from Myall Lakes to Green Cape. The habitat is dry sclerophyll forest or heath.[4] Associated species include red bloodwood (Corymbia gummifera), yellow bloodwood (C. eximia), narrow-leaved apple (Angophora bakeri), smooth-barked apple (A. costata), and silvertop ash (Eucalyptus sieberi), and watergum (Tristaniopsis laurina) and scrub beefwood (Stenocarpus salignus) along creeks.[5]

Ecology

Daviesia corymbosa regenerates from bushfire by resprouting.[5] It is a host plant for the jewel beetle species Ethonion jessicae.[6] The beetle larvae live in galls on the stems of host plants.[7]

Cultivation

Peas of the genus Daviesia are only rarely grown in cultivation. A showy plant when in flower, D. corymbosa can grow in well-drained soils in sun or dappled shade. It can be propagated by seed to cuttings.[2]

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References

"Daviesia corymbosa Sm". Australian Plant Name Index (APNI), IBIS database. Centre for Plant Biodiversity Research, Australian Government.
Elliot Rodger W.; Jones, David L.; Blake, Trevor (1984). Encyclopaedia of Australian Plants Suitable for Cultivation:Volume 3 - Ce-Er. Port Melbourne: Lothian Press. pp. 200, 204. ISBN 0-85091-167-2.
Crisp, Mike (1991). "Contributions towards a revision of Daviesia Smith (Fabaceae: Mirbelieae). II.* The D. Latifolia group". Australian Systematic Botany. 4 (2): 229–298. doi:10.1071/SB9910229.
Crisp, Mike. "New South Wales Flora Online: Daviesia corymbosa". Royal Botanic Gardens & Domain Trust, Sydney, Australia.
Benson, Doug; McDougall, Lyn (1996). "Ecology of Sydney Plant Species Part 4: Dicotyledon family Fabaceae" (PDF). Cunninghamia. 4 (4): 552–752. ISSN 0727-9620. Archived from the original (PDF) on 2014-06-23. Retrieved 2011-12-02.
Bellamy, C. L. (2002). Coleoptera: Buprestoidea. CSIRO Publishing. ISBN 0-643-06900-3.
Hawkeswood, Trevor J.; Turner, J.R. (1994). "A new species of the genus Ethon Laporte & Gory, with observations on its biology and host plants(Coleoptera: Buprestidae)" (PDF). Giornale Italiano di Entomologia. 7: 165–79. Archived from the original (PDF) on 2012-04-23.

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[1] "Daviesia corymbosa Sm". Australian Plant Name Index (APNI), IBIS database. Centre for Plant Biodiversity Research, Australian Government.

[EJ84-2] Elliot Rodger W.; Jones, David L.; Blake, Trevor (1984). Encyclopaedia of Australian Plants Suitable for Cultivation:Volume 3 - Ce-Er. Port Melbourne: Lothian Press. pp. 200, 204. ISBN 0-85091-167-2.

[asbscrisp-3] Crisp, Mike (1991). "Contributions towards a revision of Daviesia Smith (Fabaceae: Mirbelieae). II.* The D. Latifolia group". Australian Systematic Botany. 4 (2): 229–298. doi:10.1071/SB9910229.

[floransw-4] Crisp, Mike. "New South Wales Flora Online: Daviesia corymbosa". Royal Botanic Gardens & Domain Trust, Sydney, Australia.

[Benson1996-5] Benson, Doug; McDougall, Lyn (1996). "Ecology of Sydney Plant Species Part 4: Dicotyledon family Fabaceae" (PDF). Cunninghamia. 4 (4): 552–752. ISSN 0727-9620. Archived from the original (PDF) on 2014-06-23. Retrieved 2011-12-02.

[6] Bellamy, C. L. (2002). Coleoptera: Buprestoidea. CSIRO Publishing. ISBN 0-643-06900-3.

[7] Hawkeswood, Trevor J.; Turner, J.R. (1994). "A new species of the genus Ethon Laporte & Gory, with observations on its biology and host plants(Coleoptera: Buprestidae)" (PDF). Giornale Italiano di Entomologia. 7: 165–79. Archived from the original (PDF) on 2012-04-23.