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Egeria densa Planch.

Scientific name record
Names_Plants record source
Is NZ relevant
This is the current name
This record has collections
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This is a weed
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Egeria densa Planch. (1849)
Egeria densa Planch.
Healy, A. J.; Edgar, E. 1980: Flora of New Zealand. Vol. III. Adventive Cyperaceous, Petalous and Spathaceous Monocotyledons. Government Printer, Wellington.

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Exotic
Wild
New Zealand
Political Region

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Planch.
Planch.
1849
ICN
Egeria densa Planch.
species
Egeria densa

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Plantae
Tracheophyta
Magnoliopsida
Alismatales
Hydrocharitaceae
Egeria
densa

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Click to collapse Descriptions Info

Healy, A. J.; Edgar, E. 1980: Flora of New Zealand. Vol. III. Adventive Cyperaceous, Petalous and Spathaceous Monocotyledons. Government Printer, Wellington.

Egeria densa Planch.

Vigorous submersed perennial. Stems branched, brittle, c. 3 mm diam. Leaves very dark green, in whorls of 3 below, in whorls of 4 or more above, 15-30 × 4 mm, linear, lax, abruptly acute to acuminate. Male flowers obvious, usually 2-3 per spathe in axils of upper leaves; sepals green c. 4 mm long, petals white, c. 7 mm long; stamens 9, golden. Female flowers and fruits not known in N.Z.

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Egeria densa Planch.
Egeria densa Planch.
Biosecurity New Zealand (2008)
Egeria densa Planch.
Egeria densa Planch.
Egeria densa Planch.
Biosecurity New Zealand (2012)
Egeria densa Planch.
Egeria densa Planch.
Egeria densa Planch.
Biosecurity New Zealand (4 Aug 2011)
Egeria densa Planch.
Egeria densa Planch.
Egeria densa Planch.
Healy, A. J.; Edgar, E. (1980)
Egeria densa Planch.
Egeria densa Planch.
Howell, C. (2008)
Egeria densa Planch.
Egeria densa Planch.
Egeria densa Planch.
Ministry for Primary Industries (23 Feb 2017)

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Egeria densa Planch.
New Zealand
Canterbury Land District
3 Link to an external page
Egeria densa Planch.
New Zealand
Hawke's Bay Land District
1 Link to an external page
Egeria densa Planch.
New Zealand
North Auckland Land District
12 Link to an external page
Egeria densa Planch.
New Zealand
South Auckland Land District
24 Link to an external page
Egeria densa Planch.
New Zealand
Wellington Land District
8 Link to an external page
Egeria densa Planch.
New Zealand
Westland Land District
1 Link to an external page

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editorial
We are aware that POWO is using the name Elodea densa. According to their website, they’re following a 2021 Spanish paper on alien species (https://dx.doi.org/10.5209/bocm.75354), which seems like an unusual choice. We prefer to stick with Egeria densa for now because it is the more widely used and familiar name in the scientific community, especially here in New Zealand. It is also the name used in most floras, databases, and management plans, which helps keep things consistent and avoids confusion.

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265599a7-a6a6-445b-8209-1e555f7db8a0
scientific name
Names_Plants
1 January 2000
6 June 2025
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