Duckweed varieties...? - The Planted Tank Forum
 
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post #1 of 5 (permalink) Old 02-07-2020, 03:59 AM Thread Starter
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Duckweed varieties...?

Wondering if someone can help me ID or differentiate between these 2 plants? I have "duckweed" that has 1-2 leaves with a very thin, single ~1 inch root and then I have duckweed #2. They have ~4 leaves with a group of very short stiff roots. These leaves are also much crisper than the regular (#1) Duckweed.
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post #2 of 5 (permalink) Old 02-07-2020, 01:41 PM
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My duckweed (giant) grows 4 leaves then splits off into smaller groups of 1-2 leaves which then grow back to 4 leaves. Could you be looking at the same species just at different maturities?


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post #3 of 5 (permalink) Old 02-07-2020, 02:30 PM
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Duckweed #1 I'd say is a Lemna sp. Probably Lemna minor (common duckweed)

Duckweed #2 I'd say is a Spirodela sp. Probably Spirodela polyrhiza (greater or giant duckweed)

https://nature.mdc.mo.gov/discover-n...eeds-watermeal

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post #4 of 5 (permalink) Old 02-07-2020, 03:44 PM Thread Starter
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Quote:
Originally Posted by minorhero View Post
My duckweed (giant) grows 4 leaves then splits off into smaller groups of 1-2 leaves which then grow back to 4 leaves. Could you be looking at the same species just at different maturities?
The plants pictured a!so #1 is very thin and pliable, whereas #2 is thicker and stiffer. In asking around I believe #2 may be Lemna valdiviana?
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post #5 of 5 (permalink) Old 02-07-2020, 04:31 PM
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From what I've seen all Lemnas have one single root. Spirodelas have multiple roots like your picture. The darker underside too

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