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Darwinia glaucophylla ( 英語 )

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Darwinia glaucophylla is a plant in the myrtle family Myrtaceae which grows as a prostrate shrub, sometimes forming extensive mats. It has bluish green leaves and white flowers in small groups which fade to reddish pink as they age. It is only known from about fifteen sites in the Gosford area and is listed as "threatened" in New South Wales legislation.

Description

Darwinia glaucophylla is a prostrate shrub but with erect side branches which reach to a height of 15 cm (6 in). The leaves are arranged in opposite pairs and are bluish green with a reddish tinge, glabrous, 8–17 mm (0.3–0.7 in) long and triangular in cross section. The flowers are arranged mostly in groups of between two and four, the groups on a stalk about 1 mm (0.04 in) long. There are leaf-like bracts 8–12 mm (0.3–0.5 in) long and reddish brown bracteoles at the base of the groups but which fall off as the flowers develop. The floral cup is 7–8 mm (0.28–0.31 in) long, about 1 mm (0.04 in) wide and has distinct ribs. The sepals are 0.5 mm (0.02 in) or less long and much shorter than the petals. The style is straight, white and 12–16 mm (0.5–0.6 in) long. Flowering occurs from July to November and is followed by fruit which is a tiny capsule containing a single seed 1.5 mm (0.06 in) in diameter.[2][3][4][5]

Taxonomy and naming

Darwinia glaucophylla was first formally described in 1962 by Barbara Briggs from a specimen she collected near Kariong and the description was published in Contributions from the New South Wales National Herbarium. The specific epithet (glaucophylla) is derived from the Ancient Greek words glaukos meaning "bluish-green" or "gray"[6]: 369  and phyllon meaning "leaf".[6]: 466 

Hybrids between this species and D. fascicularis are known, but are easily recognised as they have a more erect habit.[2]

Distribution and habitat

This darwinia grows in heath and open forest in soils derived from sandstone. It is only known from about fifteen sites near Calga, Kariong and Somersby.[2][3][4]

Conservation

Darwinia glaucophylla is classified as "threatened" under the New South Wales Biodiversity Conservation Act 2016. The main threats to the species are habitat degradation, inappropriate fire regimes and extension of a nearby sand mine. Some research suggests that the species may benefit from mowing and appropriate use of burning.[3][7]

References

  1. ^ "Darwinia glaucophylla". World Checklist of Selected Plant Families (WCSP). Royal Botanic Gardens, Kew.
  2. ^ a b c Wilson, Peter G. "Darwinia glaucophylla". Royal Botanic Garden Sydney. Retrieved 10 May 2018.
  3. ^ a b c "Darwinia glaucophylla - profile". New South Wales Government Office of Environment and Heritage. Retrieved 10 May 2018.
  4. ^ a b Fairley, Alan; Moore, Philip (2010). Native plants of the Sydney region : from Newcastle to Nowra and west to the Dividing Range (3rd ed.). Crows Nest, N.S.W.: Allen & Unwin. pp. 292–293. ISBN 9781741755718.
  5. ^ Tindale, Mary D.; Carolin, Roger C. (1994). Flora of the Sydney region (4th ed.). Chatswood, NSW: Reed. pp. 404–405. ISBN 0730104001.
  6. ^ a b Brown, Roland Wilbur (1956). The Composition of Scientific Words. Washington, D.C.: Smithsonian Institution Press.
  7. ^ Booyens, Carmen; Chalmers, Anita; Beckers, Douglas (2014). "The effect of disturbance regime on Darwinia glaucophylla (Myrtaceae) and its habitat". Proceedings of the Linnean Society of New South Wales. 136: 231–244. Retrieved 10 May 2018.
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Darwinia glaucophylla: Brief Summary ( 英語 )

由wikipedia EN提供

Darwinia glaucophylla is a plant in the myrtle family Myrtaceae which grows as a prostrate shrub, sometimes forming extensive mats. It has bluish green leaves and white flowers in small groups which fade to reddish pink as they age. It is only known from about fifteen sites in the Gosford area and is listed as "threatened" in New South Wales legislation.

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Darwinia glaucophylla ( 越南語 )

由wikipedia VI提供

Darwinia glaucophylla là một loài thực vật có hoa trong Họ Đào kim nương. Loài này được B.G.Briggs mô tả khoa học đầu tiên năm 1962.[2]

Chú thích

  1. ^ Darwinia glaucophylla. Australian Plant Name Index (APNI), IBIS database. Centre for Plant Biodiversity Research, Australian Government, Canberra. Truy cập ngày 17 tháng 4 năm 2010.
  2. ^ The Plant List (2010). Darwinia glaucophylla. Truy cập ngày 7 tháng 6 năm 2013.

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Darwinia glaucophylla: Brief Summary ( 越南語 )

由wikipedia VI提供

Darwinia glaucophylla là một loài thực vật có hoa trong Họ Đào kim nương. Loài này được B.G.Briggs mô tả khoa học đầu tiên năm 1962.

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Wikipedia tác giả và biên tập viên
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wikipedia VI