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Myriophyllum implicatum Orchard
Family Haloragaceae
Myriophyllum implicatum Orchard APNI*

Description: Creeping, matted herb, fully emergent; stems up to 0.5 mm diam., prostrate parts rooting freely at the nodes.

Leaves alternate, linear, 2.5–5 mm long, entire.

Plants dioecious, flowers solitary in the axils. Male flowers very shortly pedicellate; sepals absent or minute; petals 2–2.5 mm long, cream to red. Female flowers sessile; sepals and petals absent; stigmas white. Mericarps cylindrical, up to 1 mm long, reddish purple, strongly papillose.

Mericarps cylindrical, up to 1 mm long, reddish purple, strongly papillose.

Photo R. Jensen

Distribution and occurrence: in coastal situations on freshwater seepage areas on the North Coast, and more recently found in inland wetlands in the Pilliga area. The "tank gilgai" or ephemeral wetlands of the Pilliga outwash that provide habitat for M. implicatum are described by J.S. Benson et al., Cunninghamia 11(4): 457–579 (2010) and D.M. Bell et al., Cunninghamia 12(3): 181-190 (2012).
NSW subdivisions: ?NC, NWP
Other Australian states: Qld
Threatened species: NSW BCA: Critically Endangered
AVH map***

Was considered possibly extinct in N.S.W. till collected in 2008 during a vegetation survey in the Pilliga region.

Text by Peter G. Wilson (edited by P.G. Kodela & P.G. Wilson, April 2009; last updated August 2012)
Taxon concept: A.E. Orchard, Flora of Australia Volume 18 (1990)

APNI* Provides a link to the Australian Plant Name Index (hosted by the Australian National Botanic Gardens) for comprehensive bibliographic data
***The AVH map option provides a detailed interactive Australia wide distribution map drawn from collections held by all major Australian herbaria participating in the Australian Virtual Herbarium project.
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