plant ID *two-leaved amano pearl who?* - The Planted Tank Forum
 
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post #1 of 9 (permalink) Old 12-12-2006, 04:46 AM Thread Starter
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Question plant ID *two-leaved amano pearl who?*

It just occurred to me that the weird shoots rising out of my HM are an entirely different plant after noticing it has only two leaves per node which are similar in shape to certain rotala and ludwigia leaves. I'm having a heck of a time trying to ID it. the stem is thinner than HM's and they reach for the sky even under my 3.2wpg, they branch off at the nodes crawling through other plants like runners. The span of both leaves is about half an inch, their direction rotates anywhere from 20 to 45 degrees at each node and they have a delicate veiny texture like HM leaves, which gave it the ability to hide from me during planting. Any help is appreciated, I'm worn out on database pics....




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post #2 of 9 (permalink) Old 12-12-2006, 05:01 AM
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I'm curious as well. I have some of this plant and always thought it was HM.
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post #3 of 9 (permalink) Old 12-12-2006, 05:18 AM Thread Starter
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Yeah, I've even seen it in a database or two labeled HM, but it's definately not the HM seen in every other pic or in my tank. The leaves aren't even close except for color and texture (kinda), thinner stem, and it grows much more loosely, not to mention no more than two leaves per node, ever.
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post #4 of 9 (permalink) Old 12-12-2006, 07:16 PM
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Is it ET? elidante trinidad I think is how you spell it? I think that's what I have in my tank...

- Andrew
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post #5 of 9 (permalink) Old 12-12-2006, 07:46 PM
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Originally Posted by Fish Newb View Post
Is it ET? elidante trinidad I think is how you spell it? I think that's what I have in my tank...

- Andrew
Elatine Triandra, perhaps? It does look like a wort species, but maybe not that one.

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post #6 of 9 (permalink) Old 12-12-2006, 09:28 PM Thread Starter
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i suspected elatine triandra for a sec from the leaf shape, but doesn't that stuff stay low to the ground? this is climbing fast even under high light, shame, I've always wanted some ET for it's tendancy to create ground cover. maybe this is a slightly diff species.
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post #7 of 9 (permalink) Old 12-12-2006, 09:49 PM
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I had some ET in the same tank as my HM looking plant. Mine is for sure not ET, I don't think your's is either as they look like the same plant.
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post #8 of 9 (permalink) Old 12-13-2006, 01:51 AM
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Elatine triandra it is not.

There is a form of Hemianthus micranthemoides that has two leaves like that. It is often called "Two-leaved Pearlweed" or "Amano Pearlweed". I have it. Thats what you have looks like to me.


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post #9 of 9 (permalink) Old 12-13-2006, 02:56 AM Thread Starter
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That would explain why I've seen it listed as pearlweed, also. I had a feeling that might be the case, but I thought two leaves would constitute a different species. I guess I gotta brush up on my plant taxonomy, I left off in ohh... ninth grade

Update: well, thanks Momotaro for the obvious search terms I should have been using while I was scanning pics bent that it's a different species.

For anyone interested, it seems there's been a bit of a fuss over this very topic for awhile, which includes M.umbrosum. Here's an interesting thread from 2000 that I stumbled across where it was debated whether or not these plants deserve different names. The difference is obviously clear, I just know it would be nice, for the purpose of ordering things, to know the difference. They definately warrant different uses in the tank.
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