Plants of South Eastern New South Wales
Cycnogeton rheophilum
Common name
None
Family
Juncaginaceae
Where found
Aquatic. In flowing clear fresh water in permanent, often rocky, streams and rivers, often flowing through tall open forests with thick shrub understoreys. Coast, ranges, and the eastern edge of the tablelands.
Notes
Perennial aquatic herb, rhizomatous. Scape submerged and trailing. Leaves basal, arising in tufts from the rhizome, strap-like, thin, 41–450 cm long, 2–16 mm wide, usually submerged and trailing in fast-flowing water, often spiralled or with wavy margins, thickened and spongy towards the base, basal sheaths narrow. Flowers with 6 small 'petals' in two whorls. Flowers in a dense oval spike-like cluster, the rachis and individual flower stalks of the inflorescence green to maroon. Flowers September–February. Seed cases more or less oval, 9–16 mm long. Fruiting spikes with about 20–232 seed cases. Seeds straight or sometimes twisted, the ridge at the top typically prominent and narrow-convex, ridges on the sides broad-convex to absent.
Was Triglochin rheophila.
PlantNET description: http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Cycnogeton~rheophilum (accessed 9 January, 2021)
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