Cycnogeton rheophilum (Aston) Mering & Kadereit

Diversity Phylogeny Evol. Monocotyledons 73 (2010) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Allied to Cycnogeton procerum but leaves usually submerged and trailing in fast-flowing water, often spiralled or undulate-margined, isolateral, thin-textured, 41–450 cm long, 2–16 mm wide, only slightly thickened basally, ± linear in cross-section c. 3 cm below the sheath summit with the width of the central portion c. 4.5–21 times its thickness and the leaf-sheaths narrow, mostly tightly inrolled, never meeting across the face of the blade (width of each usually less than one-quarter of the leaf width); leaves sometimes dorsiventral and glossy above when stranded. Scape at fruiting submerged, trailing, often semi-flattened. Fruits c. 20–232 per infructescence, ± ellipsoid in outline, 9–16 mm long, 5–9.5 mm diam.; carpels 6 (occasionally 7), normally all maturing; mature carpels ventrally attached along 63–70% of the carpel length, straight or sometimes twisted, the dorsal ridge typically prominent and narrow-convex, lateral ridges broad-convex to absent. Fruits Sep.–Feb.

EGL, EGU, HSF. Also Qld, NSW, Tas. Inhabits flowing clear fresh water in permanent, often rocky, streams and rivers, typically flowing through tall open-forests with thick shrub understoreys.

Created by: Andre Messina, 2014-07-22
Updated by: Val Stajsic, 2019-02-11
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Lilianae
order Alismatales
family Juncaginaceae
genus Cycnogeton
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <>. Find Cycnogeton rheophilum in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Cycnogeton rheophilum in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
East Gippsland Lowlands present native
East Gippsland Uplands present native
Highlands-Southern Fall present native

State distribution

Distribution map
New South Wales