Species profile—Hydrocotyle dipleura

Classification

Plantae (plants) → Equisetopsida (land plants) → Araliaceae → Hydrocotyle dipleura

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Species details

Kingdom

Plantae (plants)

Class

Equisetopsida (land plants)

Family

Araliaceae

Scientific name

Hydrocotyle dipleura A.R.Bean

WildNet taxon ID

28797

Nature Conservation Act 1992 (NCA) status

Vulnerable

Back on Track (BoT) status

High

Conservation significant

Yes

Confidential

No

Endemicity

Native

Pest status

Nil

Short Notes

Status annotated by author

Description

Hydrocotyle dipleura is a perennial herb with horizontal, creeping stems and leaves occurring singly at each node. The leaves are circular to heart- or kidney-shaped, 2-8mm in radius, pale yellow-green coloured, hairless and with the margins entire or having 3-5 broad, shallow lobes. The leaf stalks are erect and 6-50mm long. Group of 6-9 greenish-white flowers are borne on stalks 3-17mm long. The individual petals are triangular and about 0.4mm long. Fruits comprise two laterally flattened mericarps, each 0.55-0.65 mm long, 0.45-0.6 mm wide, with lateral ribs in 2 pairs, prominent and dorsal ribs forming a narrow wing, the surface smooth.
Hydrocotyle dipleura is similar to H. peduncularis which, however, has inflorescences with 3-6 flowers, and mericarps with 1 pair of lateral ribs. (Bean & Henwood 2003)

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Distribution

Hydrocotyle dipleura is endemic to western Queensland, found only near Aramac, Clermont and Eulo. (Bean & Henwood 2003; Herbrecs 2008)

Distributional limits

-22.0909473, 144.7387001
-28.25355, 146.2408511

Range derivation

Range derived from extent of the taxon's verified records

Habitat

Hydrocotyle dipleura has a highly specialised habitat. It grows on the flat dried-out margins of artesian springs in highly saline sands or clay soils. It has been recorded in low woodlands of Melaleuca bracteata. (Bean & Henwood 2003)

Reproduction

Hydrocotyle dipleura has been recorded with flowers and fruit in February, April and November. (Bean & Henwood 2003)

Notes

Contributors: Tony Bean, Mellisa Mayhew 19/06/2009

References

Bean, A.R. & Henwood, M.J. (2003). Six new species of Hydrocotyle L. (Apiaceae) from Queensland. Austrobaileya 6(3): 539.
Herbrecs (2008). Hydrocotyle dipleura, in BriMapper version 2.12. Queensland Herbarium. Accessed 03/10/2008.

Profile author

Tony Bean (19/06/2009)

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